Hello,
I'm doing an update to my app already IN the app store.
The app is built using .Net Maui targeting iOS, Windows and Android.
All works fine in debug and in release on Android and Windows.
However, the app launches on my iOS devices and crashes immediately.
I really have no idea what the crash report on the device is telling me.
Attached is the .ips file if anyone can at least point me in the right direction...
Thanks
MyApp-2025-03-01-202630.ips
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The 'view' and 'modifier' were displayed on my particular project, but it is no longer displayed.
I don't know which shortcut key was hidden.
What should I do to display it again?
Topic:
Developer Tools & Services
SubTopic:
Xcode
This posts collects together a bunch of information about the symbols found in a Mach-O file.
It assumes the terminology defined in An Apple Library Primer. If you’re unfamiliar with a term used here, look there for the definition.
If you have any questions or comments about this, start a new thread in the Developer Tools & Services > General topic area and tag it with Linker.
Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"
Understanding Mach-O Symbols
Every Mach-O file has a symbol table. This symbol table has many different uses:
During development, it’s written by the compiler.
And both read and written by the linker.
And various other tools.
During execution, it’s read by the dynamic linker.
And also by various APIs, most notably dlsym.
The symbol table is an array of entries. The format of each entry is very simple, but they have been used and combined in various creative ways to achieve a wide range of goals. For example:
In a Mach-O object file, there’s an entry for each symbol exported to the linker.
In a Mach-O image, there’s an entry for each symbol exported to the dynamic linker.
And an entry for each symbol imported from dynamic libraries.
Some entries hold information used by the debugger. See Debug Symbols, below.
Examining the Symbol Table
There are numerous tools to view and manipulate the symbol table, including nm, dyld_info, symbols, strip, and nmedit. Each of these has its own man page.
A good place to start is nm:
% nm Products/Debug/TestSymTab
U ___stdoutp
0000000100000000 T __mh_execute_header
U _fprintf
U _getpid
0000000100003f44 T _main
0000000100008000 d _tDefault
0000000100003ecc T _test
0000000100003f04 t _testHelper
Note In the examples in this post, TestSymTab is a Mach-O executable that’s formed by linking two Mach-O object files, main.o and TestCore.o.
There are three columns here, and the second is the most important. It’s a single letter indicating the type of the entry. For example, T is a code symbol (in Unix parlance, code is in the text segment), D is a data symbol, and so on. An uppercase letter indicates that the symbol is visible to the linker; a lowercase letter indicates that it’s internal.
An undefined (U) symbol has two potential meanings:
In a Mach-O image, the symbol is typically imported from a specific dynamic library. The dynamic linker connects this import to the corresponding exported symbol of the dynamic library at load time.
In a Mach-O object file, the symbol is undefined. In most cases the linker will try to resolve this symbol at link time.
Note The above is a bit vague because there are numerous edge cases in how the system handles undefined symbols. For more on this, see Undefined Symbols, below.
The first column in the nm output is the address associated with the entry, or blank if an address is not relevant for this type of entry. For a Mach-O image, this address is based on the load address, so the actual address at runtime is offset by the slide. See An Apple Library Primer for more about those concepts.
The third column is the name for this entry. These names have a leading underscore because that’s the standard name mangling for C. See An Apple Library Primer for more about name mangling.
The nm tool has a lot of formatting options. The ones I use the most are:
-m — This prints more information about each symbol table entry. For example, if a symbol is imported from a dynamic library, this prints the library name. For a concrete example, see A Deeper Examination below.
-a — This prints all the entries, including debug symbols. We’ll come back to that in the Debug Symbols section, below.
-p — By default nm sorts entries by their address. This disables that sort, causing nm to print the entries in the order in which they occur in the symbol table.
-x — This outputs entries in a raw format, which is great when you’re trying to understand what’s really going on. See Raw Symbol Information, below, for an example of this.
A Deeper Examination
To get more information about each symbol table, run nm with the -m option:
% nm -m Products/Debug/TestSymTab
(undefined) external ___stdoutp (from libSystem)
0000000100000000 (__TEXT,__text) [referenced dynamically] external __mh_execute_header
(undefined) external _fprintf (from libSystem)
(undefined) external _getpid (from libSystem)
0000000100003f44 (__TEXT,__text) external _main
0000000100008000 (__DATA,__data) non-external _tDefault
0000000100003ecc (__TEXT,__text) external _test
0000000100003f04 (__TEXT,__text) non-external _testHelper
This contains a world of extra information about each entry. For example:
You no longer have to remember cryptic single letter codes. Instead of U, you get undefined.
If the symbol is imported from a dynamic library, it gives the name of that dynamic library. Here we see that _fprintf is imported from the libSystem library.
It surfaces additional, more obscure information. For example, the referenced dynamically flag is a flag used by the linker to indicate that a symbol is… well… referenced dynamically, and thus shouldn’t be dead stripped.
Undefined Symbols
Mach-O’s handling of undefined symbols is quite complex. To start, you need to draw a distinction between the linker (aka the static linker) and the dynamic linker.
Undefined Symbols at Link Time
The linker takes a set of files as its input and produces a single file as its output. The input files can be Mach-O images or dynamic libraries [1]. The output file is typically a Mach-O image [2]. The goal of the linker is to merge the object files, resolving any undefined symbols used by those object files, and create the Mach-O image.
There are two standard ways to resolve an undefined symbol:
To a symbol exported by another Mach-O object file
To a symbol exported by a dynamic library
In the first case, the undefined symbol disappears in a puff of linker magic. In the second case, it records that the generated Mach-O image depends on that dynamic library [3] and adds a symbol table entry for that specific symbol. That entry is also shown as undefined, but it now indicates the library that the symbol is being imported from.
This is the core of the two-level namespace. A Mach-O image that imports a symbol records both the symbol name and the library that exports the symbol.
The above describes the standard ways used by the linker to resolve symbols. However, there are many subtleties here. The most radical is the flat namespace. That’s out of scope for this post, because it’s a really bad option for the vast majority of products. However, if you’re curious, the ld man page has some info about how symbol resolution works in that case.
A more interesting case is the -undefined dynamic_lookup option. This represents a halfway house between the two-level namespace and the flat namespace. When you link a Mach-O image with this option, the linker resolves any undefined symbols by adding a dynamic lookup undefined entry to the symbol table. At load time, the dynamic linker attempts to resolve that symbol by searching all loaded images. This is useful if your software works on other Unix-y platforms, where a flat namespace is the norm. It can simplify your build system without going all the way to the flat namespace.
Of course, if you use this facility and there are multiple libraries that export that symbol, you might be in for a surprise!
[1] These days it’s more common for the build system to pass a stub library (.tbd) to the linker. The effect is much the same as passing in a dynamic library. In this discussion I’m sticking with the old mechanism, so just assume that I mean dynamic library or stub library.
If you’re unfamiliar with the concept of a stub library, see An Apple Library Primer.
[2] The linker can also merge the object files together into a single object file, but that’s relatively uncommon operation. For more on that, see the discussion of the -r option in the ld man page.
[3] It adds an LC_LOAD_DYLIB load command with the install name from the dynamic library. See Dynamic Library Identification for more on that.
Undefined Symbols at Load Time
When you load a Mach-O image the dynamic linker is responsible for finding all the libraries it depends on, loading them, and connecting your imports to their exports. In the typical case the undefined entry in your symbol table records the symbol name and the library that exports the symbol. This allows the dynamic linker to quickly and unambiguously find the correct symbol. However, if the entry is marked as dynamic lookup [1], the dynamic linker will search all loaded images for the symbol and connect your library to the first one it finds.
If the dynamic linker is unable to find a symbol, its default behaviour is to fail the load of the Mach-O image. This changes if the symbol is a weak reference. In that case, the dynamic linking continues to load the image but sets the address of the symbol to NULL. See Weak vs Weak vs Weak, below, for more about this.
[1] In this case nm shows the library name as dynamically looked up.
Weak vs Weak vs Weak
Mach-O supports two different types of weak symbols:
Weak references (aka weak imports)
Weak definitions
IMPORTANT If you use the term weak without qualification, the meaning depends on your audience. App developers tend to assume that you mean a weak reference whereas folks with a C++ background tend to assume that you mean a weak definition. It’s best to be specific.
Weak References
Weak references support the availability mechanism on Apple platforms. Most developers build their apps with the latest SDK and specify a deployment target, that is, the oldest OS version on which their app runs. Within the SDK, each declaration is annotated with the OS version that introduced that symbol [1]. If the app uses a symbol introduced later than its deployment target, the compiler flags that import as a weak reference. The app is then responsible for not using the symbol if it’s run on an OS release where it’s not available.
For example, consider this snippet:
#include <xpc/xpc.h>
void testWeakReference(void) {
printf("%p\n", xpc_listener_set_peer_code_signing_requirement);
}
The xpc_listener_set_peer_code_signing_requirement function is declared like so:
API_AVAILABLE(macos(14.4))
…
int
xpc_listener_set_peer_code_signing_requirement(…);
The API_AVAILABLE macro indicates that the symbol was introduced in macOS 14.4. If you build this code with the deployment target set to macOS 13, the symbol is marked as a weak reference:
% nm -m Products/Debug/TestWeakRefC
…
(undefined) weak external _xpc_listener_set_peer_code_signing_requirement (from libSystem)
If you run the above program on macOS 13, it’ll print NULL (actually 0x0).
Without support for weak references, the dynamic linker on macOS 13 would fail to load the program because the _xpc_listener_set_peer_code_signing_requirement symbol is unavailable.
[1] In practice most of the SDK’s declarations don’t have availability annotations because they were introduced before the minimum deployment target supported by that SDK.
Weak definitions
Weak references are about imports. Weak definitions are about exports. A weak definition allows you to export a symbol from multiple images. The dynamic linker coalesces these symbol definitions. Specifically:
The first time it loads a library with a given weak definition, the dynamic linker makes it the primary.
It registers that definition such that all references to the symbol resolve to it. This registration occurs in a namespace dedicated to weak definitions. That namespace is flat.
Any subsequent definitions of that symbol are ignored.
Weak definitions are weird, but they’re necessary to support C++’s One Definition Rule in a dynamically linked environment.
IMPORTANT Weak definitions are not just weird, but also inefficient. Avoid them where you can. To flush out any unexpected weak definitions, pass the -warn_weak_exports option to the static linker.
The easiest way to create a weak definition is with the weak attribute:
__attribute__((weak))
void testWeakDefinition(void) {
}
IMPORTANT The C++ compiler can generate weak definitions without weak ever appearing in your code.
This shows up in nm like so:
% nm -m Products/Debug/TestWeakDefC
…
0000000100003f40 (__TEXT,__text) weak external _testWeakDefinition
…
The output is quite subtle. A symbol flagged as weak external is either a weak reference or a weak definition depending on whether it’s undefined or not. For clarity, use dyld_info instead:
% dyld_info -imports -exports Products/Debug/TestWeakRefC
Products/Debug/TestWeakDefC [arm64]:
…
-imports:
…
0x0001 _xpc_listener_set_peer_code_signing_requirement [weak-import] (from libSystem)
% dyld_info -imports -exports Products/Debug/TestWeakDefC
Products/Debug/TestWeakDefC [arm64]:
-exports:
offset symbol
…
0x00003F40 _testWeakDefinition [weak-def]
…
…
Here, weak-import indicates a weak reference and weak-def a weak definition.
Weak Library
There’s one final confusing use of the term weak, that is, weak libraries. A Mach-O image includes a list of imported libraries and a list of symbols along with the libraries they’re imported from. If an image references a library that’s not present, the dynamic linker will fail to load the library even if all the symbols it references in that library are weak references.
To get around this you need to mark the library itself as weak. If you’re using Xcode it will often do this for your automatically. If it doesn’t, mark the library as optional in the Link Binary with Libraries build phase.
Use otool to see whether a library is required or optional. For example, this shows an optional library:
% otool -L Products/Debug/TestWeakRefC
Products/Debug/TestWeakRefC:
/usr/lib/libEndpointSecurity.dylib (… 511.60.5, weak)
…
In the non-optional case, there’s no weak indicator:
% otool -L Products/Debug/TestWeakRefC
Products/Debug/TestWeakRefC:
/usr/lib/libEndpointSecurity.dylib (… 511.60.5)
…
Debug Symbols
or Why the DWARF still stabs. (-:
Historically, all debug information was stored in symbol table entries, using a format knows as stabs. This format is now obsolete, having been largely replaced by DWARF. However, stabs symbols are still used for some specific roles.
Note See <mach-o/stab.h> and the stab man page for more about stabs on Apple platforms. See stabs and DWARF for general information about these formats.
In DWARF, debug symbols aren’t stored in the symbol table. Rather, debug information is stored in various __DWARF sections. For example:
% otool -l Intermediates.noindex/TestSymTab.build/Debug/TestSymTab.build/Objects-normal/arm64/TestCore.o | grep __DWARF -B 1
sectname __debug_abbrev
segname __DWARF
…
The compiler inserts this debug information into the Mach-O object file that it creates. Eventually this Mach-O object file is linked into a Mach-O image. At that point one of two things happens, depending on the Debug Information Format build setting.
During day-to-day development, set Debug Information Format to DWARF. When the linker creates a Mach-O image from a bunch of Mach-O object files, it doesn’t do anything with the DWARF information in those objects. Rather, it records references to the source objects files into the final image. This is super quick.
When you debug that Mach-O image, the debugger finds those references and uses them to locate the DWARF information in the original Mach-O object files.
Each reference is stored in a stabs OSO symbol table entry. To see them, run nm with the -a option:
% nm -a Products/Debug/TestSymTab
…
0000000000000000 - 00 0001 OSO …/Intermediates.noindex/TestSymTab.build/Debug/TestSymTab.build/Objects-normal/arm64/TestCore.o
0000000000000000 - 00 0001 OSO …/Intermediates.noindex/TestSymTab.build/Debug/TestSymTab.build/Objects-normal/arm64/main.o
…
Given the above, the debugger knows to look for DWARF information in TestCore.o and main.o. And notably, the executable does not contain any DWARF sections:
% otool -l Products/Debug/TestSymTab | grep __DWARF -B 1
%
When you build your app for distribution, set Debug Information Format to DWARF with dSYM File. The executable now contains no DWARF information:
% otool -l Products/Release/TestSymTab | grep __DWARF -B 1
%
Xcode runs dsymutil tool to collect the DWARF information, organise it, and export a .dSYM file. This is actually a document package, within which is a Mach-O dSYM companion file:
% find Products/Release/TestSymTab.dSYM
Products/Release/TestSymTab.dSYM
Products/Release/TestSymTab.dSYM/Contents
…
Products/Release/TestSymTab.dSYM/Contents/Resources/DWARF
Products/Release/TestSymTab.dSYM/Contents/Resources/DWARF/TestSymTab
…
% file Products/Release/TestSymTab.dSYM/Contents/Resources/DWARF/TestSymTab
Products/Release/TestSymTab.dSYM/Contents/Resources/DWARF/TestSymTab: Mach-O 64-bit dSYM companion file arm64
That file contains a copy of the the DWARF information from all the original Mach-O object files, optimised for use by the debugger:
% otool -l Products/Release/TestSymTab.dSYM/Contents/Resources/DWARF/TestSymTab | grep __DWARF -B 1
…
sectname __debug_line
segname __DWARF
…
Raw Symbol Information
As described above, each Mach-O file has a symbol table that’s an array of symbol table entries. The structure of each entry is defined by the declarations in <mach-o/nlist.h> [1]. While there is an nlist man page, the best documentation for this format is the the comments in the header itself.
Note The terms nlist stands for name list and dates back to truly ancient versions of Unix.
Each entry is represented by an nlist_64 structure (nlist for 32-bit Mach-O files) with five fields:
n_strx ‘points’ to the string for this entry.
n_type encodes the entry type. This is actually split up into four subfields, as discussed below.
n_sect is the section number for this entry.
n_desc is additional information.
n_value is the address of the symbol.
The four fields within n_type are N_STAB (3 bits), N_PEXT (1 bit), N_TYPE (3 bits), and N_EXT (1 bit).
To see these raw values, run nm with the -x option:
% nm -a -x Products/Debug/TestSymTab
…
0000000000000000 01 00 0300 00000036 _getpid
0000000100003f44 24 01 0000 00000016 _main
0000000100003f44 0f 01 0000 00000016 _main
…
This prints a column for n_value, n_type, n_sect, n_desc, and n_strx. The last column is the string you get when you follow the ‘pointer’ in n_strx.
The mechanism used to encode all the necessary info into these fields is both complex and arcane. For the details, see the comments in <mach-o/nlist.h> and <mach-o/stab.h>. However, just to give you a taste:
The entry for getpid has an n_type field with just the N_EXT flag set, indicating that this is an external symbol. The n_sect field is 0, indicating a text symbol. And n_desc is 0x0300, with the top byte indicating that the symbol is imported from the third dynamic library.
The first entry for _main has an n_type field set to N_FUN, indicating a stabs function symbol. The n_desc field is the line number, that is, line 22.
The second entry for _main has an n_type field with N_TYPE set to N_SECT and the N_EXT flag set, indicating a symbol exported from a section. In this case the section number is 1, that is, the text section.
[1] There is also an <nlist.h> header that defines an API that returns the symbol table. The difference between <nlist.h> and <mach-o/nlist.h> is that the former defines an API whereas the latter defines the Mach-O on-disk format. Don’t include both; that won’t end well!
I've discovered what appears to be a system-level memory leak when pressing any key in Swift UI projects. This issue occurs even in a completely empty SwiftUI project with no custom code or event handlers.
When monitoring with Instruments' Leaks tool, I observe multiple memory leaks each time any key is pressed. These leaks consist primarily of:
NSExtraData objects (240 bytes each)
NSMenuItem objects (112 bytes each)
Other AppKit and Foundation objects
Has anyone else encountered this issue? How can I fix this behavior? While the leaks are small (about 5-6KB per keypress), they could potentially accumulate in applications where keyboard input is frequent.
Hi, I have an app where user can select an amount within range 20$ - 2500$ and purchase tokens worth that amount, so if he pays 520$ he gets 520 tokens. They can then use these tokens to unlock content within the app. As far as I've seen, in-app purchase doesn't allow custom price set by user. So does this mean we can use third-party payment services? If no, how can we achieve this using in-app purchase. Thank you.
Topic:
Developer Tools & Services
SubTopic:
Apple Developer Program
Tags:
Subscriptions
StoreKit
App Store Connect
My project is using Fastlane 2.226.0. After converted groups to folders on XCode 16, I got an error when executed below function in Fastfile:
get_version_number(xcodeproj: "MyProject.xcodeproj", target: "MyProject")
Below is the error message output after I ran fastlane:
Unable to find XCode build setting: MARKETING_VERSION
I am developing a game that has 3 team members.
I can manually start up 3 simulators and run the game for developing/testing but seem like there should be a simple way to click build/run and have it launch on all three automatically.
Does anyone know how to do this or if its even possible without writing some scripts?
Topic:
Developer Tools & Services
SubTopic:
Xcode
I'm encountering an issue while trying to build my iOS app in Xcode for the simulator.
Issue:
Xcode Version: 15.x
macOS Version: 14.x (Sonoma)
Simulator: iPhone 16 Pro
Error Message: Command ClangStatCache failed with a nonzero exit code
Steps Taken:
Cleaned build folder (Shift + Cmd + K)
Deleted DerivedData (rm -rf ~/Library/Developer/Xcode/DerivedData)
Updated Xcode and checked iOS SDK updates
Disabled Clang Static Analyzer Cache
None of these steps resolved the issue. Any help would be appreciated!
Thanks in advance.
Topic:
Developer Tools & Services
SubTopic:
Xcode
Tags:
Developer Tools
Xcode Static Analyzer
Simulator
Command Line Tools
I am currently developing a No-Sandbox application.
What I want to achieve is to use AuthorizationCopyRights in a No-Sandbox application to elevate to root, then register SMAppService.daemon after elevation, and finally call the registered daemon from within the No-Sandbox application.
Implementation Details
Here is the Plist that I am registering with SMAppService:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Label</key>
<string>com.example.agent</string>
<key>BundleProgram</key>
<string>/usr/local/bin/test</string>
<key>ProgramArguments</key>
<array>
<string>/usr/local/bin/test</string>
<string>login</string>
</array>
<key>RunAtLoad</key>
<true/>
</dict>
</plist>
Code that successfully performs privilege escalation (a helper tool popup appears)
private func registerSMAppServiceDaemon() -> Bool {
let service = SMAppService.daemon(plistName: "com.example.plist")
do {
try service.register()
print("Successfully registered \(service)")
return true
} catch {
print("Unable to register \(error)")
return false
}
}
private func levelUpRoot() -> Bool {
var authRef: AuthorizationRef?
let status = AuthorizationCreate(nil, nil, [], &authRef)
if status != errAuthorizationSuccess {
return false
}
let rightName = kSMRightBlessPrivilegedHelper
return rightName.withCString { cStringName -> Bool in
var authItem = AuthorizationItem(
name: cStringName,
valueLength: 0,
value: nil,
flags: 0
)
return withUnsafeMutablePointer(to: &authItem) { authItemPointer -> Bool in
var authRights = AuthorizationRights(count: 1, items: authItemPointer)
let authFlags: AuthorizationFlags = [.interactionAllowed, .preAuthorize, .extendRights]
let status = AuthorizationCopyRights(authRef!, &authRights, nil, authFlags, nil)
if status == errAuthorizationSuccess {
if !registerSMAppServiceDaemon() {
return false
}
return true
}
return false
}
}
}
Error Details
Unable to register Error Domain=SMAppServiceErrorDomain Code=1 "Operation not permitted" UserInfo={NSLocalizedFailureReason=Operation not permitted}
The likely cause of this error is that /usr/local/bin/test is being bundled.
However, based on my understanding, since this is a non-sandboxed application, the binary should be accessible as long as it is run as root.
Trying
post as mentioned in the response, placing the test binary under Contents/Resources/ allows SMAppService to successfully register it. However, executing the binary results in a different error.
Here is the plist at that time.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Label</key>
<string>com.example.agent</string>
<key>BundleProgram</key>
<string>Contents/Resources/test</string>
<key>ProgramArguments</key>
<array>
<string>Contents/Resources/test</string>
<string>login</string>
</array>
<key>RunAtLoad</key>
<true/>
</dict>
</plist>
Here is the function at that time.
private func executeBin() {
let bundle = Bundle.main
if let binaryPath = bundle.path(forResource: "test", ofType: nil) {
print(binaryPath)
let task = Process()
task.executableURL = URL(fileURLWithPath: binaryPath)
task.arguments = ["login"]
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
do {
try task.run()
let outputData = pipe.fileHandleForReading.readDataToEndOfFile()
if let output = String(data: outputData, encoding: .utf8) {
print("Binary output: \(output)")
}
task.waitUntilExit()
if task.terminationStatus == 0 {
print("Binary executed successfully")
} else {
print("Binary execution failed with status: \(task.terminationStatus)")
}
} catch {
print("Error executing binary: \(error)")
}
} else {
print("Binary not found in the app bundle")
}
}
Executed After Error
Binary output:
Binary execution failed with status: 5
Are there any other ways to execute a specific binary as root when using AuthorizationCopyRights?
For example, by preparing a Helper Tool?
use https://api.development.push.apple.com/3/device/98bf6345fc85248dd74eb8a1ac2d18150b5e4299efe5229dd52de7f1c154a33d Push notification was successful, but the phone did not receive the message. What is the reason?
I have a VPN installed (Global Protect) on my company computer, which is a MacBook Pro M2, to access the company network, internal URLs, websites, and run the app I work on. However, even with the VPN installed, I am having trouble accessing certain resources. The solution found was to manually configure the proxies for my Wi-Fi network. After configuring the proxies, I was able to access all the company's URLs and everything I needed. However, the Xcode Simulator is not picking up these network configurations, and when I try to run the project, it does not work.
How can I solve this?
Topic:
Developer Tools & Services
SubTopic:
Xcode
Hi All,
Unable to process my payment. Which doesnt allow me to complete my enrollment and create my Apple Developer Account.
Please provide help to find a resolution.
Topic:
Developer Tools & Services
SubTopic:
Apple Developer Program
In Xcode Version 16.2 (16C5032a) - and previous versions too, the download container in the Devices & Simulators functionality no longer works.
It will start downloading the container, however it will also:
show NO download progress
fail to download the whole container (the downloaded container is missing whole directories, eg. AppData/Library is missing - where my application stores the CoreData db)
show no errors
This was tested with the XCode version stated above (and previous versions) and with iPhone XR (18.1.1 - MR42CN/A) and with iPad (17.7.2 - MR7F2FD/A).
How can I debug this issue / make the Xcode download the whole container?
Running on Mac mini 15.1.1 (24B91).
Topic:
Developer Tools & Services
SubTopic:
Xcode
This is the complete Playground code:
import MapKit
import SwiftUI
import PlaygroundSupport
struct AddressSearchView: View {
@State private var region = MKCoordinateRegion(
center: CLLocationCoordinate2D(latitude: 37.7749, longitude: -122.4194),
span: MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta: 0.01)
)
var body: some View {
VStack {
Map(position: .constant(MapCameraPosition.region(region))) {
}
.frame(height: 300)
}
}
}
struct AddressSearchView_Previews: PreviewProvider {
static var previews: some View {
AddressSearchView()
}
}
PlaygroundPage.current.setLiveView(AddressSearchView())
When I try to run this I get this in the debug console:
error: Couldn't look up symbols:
protocol witness table for _MapKit_SwiftUI.EmptyMapContent : _MapKit_SwiftUI.MapContent in _MapKit_SwiftUI
protocol witness table for _MapKit_SwiftUI.EmptyMapContent : _MapKit_SwiftUI.MapContent in _MapKit_SwiftUI
protocol witness table for _MapKit_SwiftUI.EmptyMapContent : _MapKit_SwiftUI.MapContent in _MapKit_SwiftUI
protocol witness table for _MapKit_SwiftUI.EmptyMapContent : _MapKit_SwiftUI.MapContent in _MapKit_SwiftUI
protocol witness table for _MapKit_SwiftUI.EmptyMapContent : _MapKit_SwiftUI.MapContent in _MapKit_SwiftUI
protocol witness table for _MapKit_SwiftUI.EmptyMapContent : _MapKit_SwiftUI.MapContent in _MapKit_SwiftUI
protocol witness table for _MapKit_SwiftUI.EmptyMapContent : _MapKit_SwiftUI.MapContent in _MapKit_SwiftUI
protocol witness table for _MapKit_SwiftUI.EmptyMapContent : _MapKit_SwiftUI.MapContent in _MapKit_SwiftUI
protocol witness table for _MapKit_SwiftUI.EmptyMapContent : _MapKit_SwiftUI.MapContent in _MapKit_SwiftUI
protocol witness table for _MapKit_SwiftUI.EmptyMapContent : _MapKit_SwiftUI.MapContent in _MapKit_SwiftUI
protocol witness table for _MapKit_SwiftUI.EmptyMapContent : _MapKit_SwiftUI.MapContent in _MapKit_SwiftUI
Hint: The expression tried to call a function that is not present in the target, perhaps because it was optimized out by the compiler.
the preview never shows up. If I use other SwiftUI components and not the map it works fine. What is happening?
Playground target is Swift 6 macOS (iOS does the same).
Xcode 16.2
Hello everyone,
I’m facing an issue with running my app on my iPhone, and I’m hoping someone can help. Here’s my situation:
I’m using Xcode 14.3.1 on macOS Ventura 13.7.4.
My iPhone is running iOS 18.3.2 (Model: iPhone 14 Pro).
When I connect my iPhone to Xcode, I get the error: "Could not locate device support files. You may be able to resolve the issue by installing the latest version of Xcode from the Mac App Store or developer.apple.com."
I understand that Xcode 14.3.1 only supports up to iOS 16.4, and my iPhone’s iOS 18.3.2 is much newer. Unfortunately, I cannot update my macOS to Sonoma (14.x) due to hardware limitations, so I cannot install a newer version of Xcode (like 15.x or 16.x) that supports iOS 18.3.2.
I’ve tried adding device support files manually, but the repositories I found (e.g., iGhibli/iOS-DeviceSupport and JinjunHan/iOSDeviceSupport) only have files up to iOS 16.4 or 17.3, and they don’t work for iOS 18.3.2.
Does anyone have the device support files for iOS 18.3.2 (or a close version like 18.3) that I can add to my Xcode 14.3.1 to make it work with my iPhone? Alternatively, does anyone know a reliable source where I can download these files? Any other suggestions to resolve this issue without upgrading my macOS would be greatly appreciated!
Thank you in advance for your help!
[Your Name or Username]
I'm trying to evaluate if we can support AR navigation with MapKit. The feature is supposed to be available for users in US.
I tried to run the sample on my iPhone: https://developer.apple.com/documentation/arkit/tracking-geographic-locations-in-ar?language=objc
But I'm in a location that ARGeoTrackingConfiguration.checkAvailabilityWithCompletionHandler: always return false. I think ARGeoAnchor isn't supported in my location.
I tried to use simulated locations by
Adding a gpx file when launching the app.
Enabling Xcode -> Debug -> Simulate Location -> New York, NY, US
But the availability for ARGeoAnchor is still false.
Is that possible for me to develop the ARGeoAnchor feature outside of the covered areas?
When I open developer.apple.com I do not see my other teams on the top right dropdown. After logging in, it directly takes me to one of my teams which is Nautilus and It does not allow me to change to other teams.
Hello Apple Developer Community,
I'm hoping someone can offer advice on a frustrating situation with my company's Developer Program enrollment process.
My timeline:
Initial application: October 2024
Initial follow-up: October 2024
Requested document submission: February 2025
Multiple follow-up emails: February-March 2025
Current status: No response for months
I've been trying to enroll my small startup (LLC) in the Apple Developer Program since October 2024. After initially being asked for documentation, I uploaded everything possible (including company formation documents).
Despite multiple follow-up emails over several months, I've received no updates on my application status or confirmation that my documents were even received.
My case number is 102426005487 (sharing in case Apple Support monitors these forums) but as I've followed up several times, there may be more different case numbers.
Has anyone experienced similar delays or have suggestions on how to get actual human attention on this issue? I've tried emailing to devprograms multiple times without success.
Any advice would be greatly appreciated!
Hello!
When trying to use MLTensor, I am getting the error that it is not found in scope even though I am using Xcode 15.1 (it says fully up to date) and set my deployment target to iOS 17.2. Is there something else I need to be doing in order to use MLTensor?
Thanks!
Michael
I have enrolled for being a developer 4 days ago. My Enrollment ID: R2V23J5GYP. I have received an order acknowledgment email on 6th of March but there have been no updates since then.
I am still seeing 'complete your purchase' in the main page. What should I do to get through?
I would greatly appreciate it if anyone could help me solve this problem as soon as possible. Thank you.
Topic:
Developer Tools & Services
SubTopic:
Apple Developer Program