Explore the core architecture of the operating system, including the kernel, memory management, and process scheduling.

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Apple ID username or password is "incorrect" while trying to install OS X 10.11
After trying to install OS X El Capitan onto my hard drive, I've come across a problem. When it asks me to sign into my Apple ID I do with the correct information. It then says that my username or password is incorrect. I know this is not the case because I have reset my password and tested it by signing into the App Store on my phone. Anyone else have this problem? Any fixes? Thanks.
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59k
Jun ’15
Anyone else finding Beta 2 really sluggish?
Hey all,Thought I would pose a question/debate opener,Has anyone found beta 2 of 10.11 really sluggishly slow in comparision to beta 1, I found on my mid-2010 15" (8GB Ram) even the most simple of tasks it finds reason to truggle and beachball me.Even for dev work on it, it struggles so think might be a wipe & time machine back to 10.10.4 as at least that was workable for devving in comparision to this.Was just thinking whats everyone else think??
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1.3k
Jun ’15
Safari is taking too much memory
Hello Guys;I'm trying to use the new geat features with Safari with El Capitan in my Macbook Retina 12", 1.3Ghz. Everything starts fine, but there must be a memory leak somewhere. Just after a few minutes, even with no activity in the browser I can see the safari's memory usage grows to 4 then 5 then 6Gb of RAM.Do you have the same behaviour?Thanks;
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34k
Jul ’15
Notes: New Note disabled
Hello,I have Notes 4.0 (512) running on OS X 10.11 (15A226f). I cannot create a new note. Using the shortcut cmd+N. And the menu item File > New Note is disabled (grayed). I can only create folders.All my notes are stored on iCloud. I have space available on my iCloud storage plan. Notes sync with iCloud is activated. I restarted my Mac; it did not help.Did anyone encouter that? Is this a feature or a bug? I Google for this and found nothing. I can't remember if it happened right after updating to 15A226f or a while after.Also to note, I had an issue with no free storage available on iCloud. I fixed it by deleting an iOS backup to reclaim 4GB.Thank you!
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38k
Jul ’15
Smart mailbox problem - added mailboxes disappear and deleted mailboxes reappear after quitting
I've been using 10.11 beta (15A225f) on a late 2011 MacBook Pro. One issue I've run into is that although I can create and delete smart mailboxes, the changes don't stick if I quit and restart Mail.app. I've tried a number of things -- most recently deletingBackupTOC.plistDefaultCountsEnvelope%20IndexEnvelope%20Index-shmEnvelope%20Index-walExternalUpdates.storedataExternalUpdates.storedata-shmExternalUpdates.storedata-walLSMMap2SmartMailboxesLocalProperties.plistfrom ~/Library/Mail/V3/MailData and letting Mail.app rebuild everything, but the problem persists. I can see entires being created in SmartMailboxesLocalProperties.plist when I add something, but that file gets reset when Mail.app is restarted. Any ideas?Thanks!!
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514
Jul ’15
CNContactViewController highlightPropertyWithKey produces blank VC
Has anyone tried to display a contact with the CNContactViewController making one of the email addresses highlighted? I tried it, but if I use the highlightPropertyWithKey method, the resulting controller is blank and the following message is logged:[CNUI ERROR] error calling service - Couldn’t communicate with a helper application.I also tried using the deprecated API (ABPersonViewController), and the result is exactly the same. It works fine on iOS8 though.Here's a sample code: func openAppleSeed(highlight:Bool) { let store = CNContactStore() let request = CNContactFetchRequest(keysToFetch: [CNContactEmailAddressesKey]); do { try store.enumerateContactsWithFetchRequest(request, usingBlock: { (contact:CNContact, stop:UnsafeMutablePointer<ObjCBool>) -> Void in for address in contact.emailAddresses { if address.value as! String == "John-Appleseed@mac.com" { do { let fullContact = try store.unifiedContactWithIdentifier(contact.identifier, keysToFetch: [CNContactViewController.descriptorForRequiredKeys()]) let vc = CNContactViewController(forContact: fullContact) vc.contactStore = store if highlight { vc.highlightPropertyWithKey(CNContactEmailAddressesKey, identifier: address.identifier) } self.navigationController?.pushViewController(vc, animated: true) return } catch { print("CATCHING (B)") } return; } } }) } catch { print("CATCHING (A)") } }Calling this function openAppleseed(highlight:false) works fine, but openAppleseed(highlight:true) generates the blank view controller and the log message mentioned aboved.I tested it with the latest beta (5), and both simulator and device. Same result. I am submitting a bug report now, but I was curious if anyone had the same issue. Any workarounds?Cheers.
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1.6k
Aug ’15
Where is service-target documented for launchctl?
I'm struggling to understand how to use launchctl enable/disable instead of launchctl load/unload on 10.11 15A279bThe specific issue is I want to disable mongodb so it no longer starts at boot:manoa:~ mike$ ps -ef|grep [m]ongo manoa:~ mike$ launchctl load ~/Library/LaunchAgents/homebrew.mxcl.mongodb.plist manoa:~ mike$ ps -ef|grep [m]ongo 501 1722 1 0 9:12AM ?? 0:00.09 /usr/local/opt/mongodb/bin/mongod --config /usr/local/etc/mongod.conf manoa:~ mike$ launchctl disable ~/Library/LaunchAgents/homebrew.mxcl.mongodb.plist Usage: launchctl disable <service-target>The man page for launchctl states:launchctl allows for detailed examination of launchd endpoints. A domain manages the execution policy for a collection of services. A service may be thought of as a virtual process that is always available to be spawned in response to demand. Each service has a collection of endpoints, and sending a message to one of those endpoints will cause the service to launch on demand. Domains advertise these endpoints in a shared namespace and may be thought of as synonymous with Mach bootstrap subsets. Many subcommands in launchctl take a specifier which indicates the target domain or service for the subcommand. This specifier may take one of the following forms:I'm lost without some concrete example/tutorial at this point. Which domain is my plist a part of (or can it sit across several?)Is there a WWDC session that covers how to understand what the difference is between:system/[service-name]user/<uid>/[service-name]login/<asid>/[service-name]gui/<uid>/[service-name]session/<asid>/[service-name]pid/<pid>/[service-name]Is <service-target> from the Usage: help one of the above choices or something else?manoa:~ mike$ launchctl list|grep mongo 1722 0 homebrew.mxcl.mongodbWhat is service-name specifically in this case? manoa:~ mike$ launchctl disable pid/1722/homebrew.mxcl.mongodb Could not disable service: 1: Operation not permitted
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13k
Sep ’15
Enabling parts of System Integrity Protection while disabling specific parts?
Is there a way to disable certain parts of SIP while enabling parts of it? If so, then how do I do this?I'd like to enable most of SIP (such as filesystem protections), but disable debugging restrictions so that I can attach a debugger to System Preferences to debug a preference pane, something that is normally not allowed. I'm aware of csrutil, but there's no manual for the tool, and the online help doesn't say whether it can do this or not.
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35k
Sep ’15
iCloud deleted all my Desktop and Documents files
So I updated a machine with a bunch of files on the Desktop and in the Documents folder, and when I upgraded it asked me if I wanted to store these folders on iCloud as well. I hit YES and it began trying to upload everything. Now, I guess I had a large file in one of the folders because the total upload was almost 9GB (i have 200GB of available iCloud space). It failed the upload and has just been stuck on 57kb of 8.89GB uploaded for over a day. I've tried restarting and it hasn't moved. I haven't found a way to quit it either. This has been making my machine incredibly slow and has caused the fans to speed up like crazy. Anytime I try to access an Open or Save dialog, the app I'm using crashes, whether it's Preview, Xcode, Photoshop, or even Safari. So I went to the iCloud system preferences and unchecked the "Desktop and Documents" item. I figured it wouldn't delete things that were still locally saved on my disk. But I was wrong and now every single file on both my Desktop and in my Documents is gone. Not in the trash, nowhere to be found. Gone.Can any one help me with this? Has anyone experienced something similar? The iCloud upload is still there and still isn't progressing at all (not sure what its trying to upload anyways since the files were all deleted). My computer is unusable and my files are all gone. I have a Time Machine backup from last week, but I will not have access to for almost 2 more weeks so if there's a way to recover my files sooner and kill this upload task, that would be amazing.Thanks.
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5
160k
Jun ’16
Dirty shutdown "shutdown -u"
Hi, For some reason, dirty shutdown is no longer working for me under 10.12 betaI have a script running that switches of my Mac Pro 5,1 at midnight every day. Since I travel a lot, I can remotely switch on my Mac Pro with an remotely controlled power plug switch off/switch on. Works like charm - until now. Looks like something has changed with 10.12... Anybody has an idea? Is it still working for you?Steps to reproduce:1) shutdown via terminal "shutdown -u now"2) wait until shutdown and a few minutes3) unplug the power plug and replug. Computer should start.Please note: if you do a regular shutdown, and then unplug and re-plug, computer will not start.
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1k
Jun ’16
Notes App Self Scrolls
I just filed a bug report for the Notes app as follows:Area: Notes Summary: When opening Notes with content that is larger than the open Notes App window, and attempting to edit the note, the entire note content scrolls automatically to the top although the cursor remains where text editing was inserted. Typing on the Smart Keyboard will allow text entry however the note insistently keeps scrolling to the top regardless of how often or how much text is entered into the note. Scrolling the note manually with your touch will stop the action from occurring, however that is intermittent and sometimes will scroll automatically as well. This issue will occur on both iPad and iPhone and regardless of the app is used full screen on the iPad or in Split Screen. When the Notes window is not focused and the user is engaging an app in the other split screen window, the Note window does not scroll, only when it is the focused App. Steps to Reproduce: 1. Open Notes2. Begin to edit the note by scrolling down and selecting text or placing your cursor to enter text.3. More likely to happen with a note which has enough text to enable scrolling of the note.Expected Results: The note body of text should not scroll while editing or entering text and should remain where placed either by scrolling to the place of entry with using touch or with moving the cursor with the direction keys of the Smart Keyboard. Actual Results: The note scrolls on its own without intervention. Version: IOS Beta 10.0(14A5261v) Configuration: iPad Pro 12.9" and iPhone 6S both with iOS beta 10.0
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19k
Jun ’16
How I can create a custom firmware ?
Hello Guys,So for my iPhone 5 i'm nostalgic and I want to downgrade to the iOS 6.X.X version but is not possible so I've got an idea ! Please how I can create a custom firmware ? (I transfer icons, the design and the wallpapers of the iOS in the .ipsw of the iOS 9.3.3, roughly I have the complete design of the iOS 6 while being under the iOS 9.3.3!)Thanks for reply
0
0
1.9k
Aug ’16
UIGestureGraphEdge Crash
When I clicked the NavigationBar in my App,it crashed.It only crashes in iOS 10 .The console log is:Assertion failure in -[UIGestureGraphEdge initWithLabel:sourceNode:targetNode:directed:], /BuildRoot/Library/Caches/com.apple.xbs/Sources/UIKit/UIKit-3599.6/Source/GestureGraph/UIGestureGraphEdge.m:25
11
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3.4k
Aug ’16
Sending data to server in background mode(killed app state)
Hi guys, I got one issue about sending data with interval 1000 seconds to the server, while the app has been killed by user. I found the relevant document about app in background mode. https://developer.apple.com/library/ios/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/BackgroundExecution/BackgroundExecution.html but I checked the document, it seems there is no way to use NSTimer inside the block of beginBackgroundTaskWithName... function. NSTimer.scheduledTimerWithTimeInterval(10, target: self, selector: #selector(AppDelegate.handleTimer), userInfo: nil, repeats: true) Question: How to consistently send data to server with interval time while app has been terminated? Thank you, e
8
0
9.3k
Sep ’16
Various iOS apps log out randomly, lose all data & settings
I've been experiencing an issue that has causing me a lot of problems, as various apps including Whatsapp, Telegram, Linkedin, Slack, Lastpass, and more will randomly log out, and reset back to their inital state as if I just installed it on a clean phone. Apps like Whatsapp and Telegram will have lost all of their chat history, even if it was backup up on iCloud.I'm at a total loss as to what might be causing this problem after restoring the phone multiple times (the last time without restoring to a backup).My phone is an iPhone 6S 64GB running iOS 10.2 (isn't BETA).
11
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46k
Jan ’17