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My macOS app is unable to read a Managed Preferences plist unless the App Sandbox is disabled. Is there any solution to read the MDM plist file while the sandbox is still enabled?
I created two sample apps — one sandboxed and one non‑sandboxed. I tested reading Managed Preferences using bash commands, CFPreferencesCopyValue for a domain, and defaults read. Everything works correctly only when the sandbox is disabled in the entitlements. When the sandbox is enabled, I’m unable to read values from /Library/Managed Preferences/. Is there any supported way for a sandboxed macOS app to read an MDM-delivered preference plist under /Library/Managed Preferences/? Any guidance on the correct and Apple‑supported method would be appreciated.
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MPS SDPA Attention Kernel Regression on A14-class (M1) in macOS 26.3.1 — Works on A15+ (M2+)
Summary Since macOS 26, our Core ML / MPS inference pipeline produces incorrect results on Mac mini M1 (Macmini9,1, A14-class SoC). The same model and code runs correctly on M2 and newer (A15-class and up). The regression appears to be in the Scaled Dot-Product Attention (SDPA) kernel path in the MPS backend. Environment Affected Mac mini M1 — Macmini9,1 (A14-class) Not affected M2 and newer (A15-class and up) Last known good macOS Sequoia First broken macOS 26 (Tahoe) ? Confirmed broken on macOS 26.3.1 Framework Core ML + MPS backend Language C++ (via CoreML C++ API) Description We ship an audio processing application (VoiceAssist by NoiseWorks) that runs a deep learning model (based on Demucs architecture) via Core ML with the MPS compute unit. On macOS Sequoia this works correctly on all Apple Silicon Macs including M1. After updating to macOS 26 (Tahoe), inference on M1 Macs fails — either producing garbage output or crashing. The same binary, same .mlpackage, same inputs work correctly on M2+. O
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Apple continues to reject but no issue on our end
everything is working perfectly fine on my end and I continue to get this message, please help me navigate this. Review date: March 23, 2026 Review Device: iPad Air 11-inch (M3) Version reviewed: 1.0 Guideline 2.1(a) - Performance - App Completeness Issue Description The app exhibited one or more bugs that would negatively impact users. Bug description: When we tried to log in the app was returning to the login page. Review device details: Device type: iPad Air 11-inch (M3) OS version: iPadOS 26.3.1 Internet Connection: Active
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Reply to TestFlight build visible on macOS but not installable: “Can only be tested on an iOS device” for Mac (Designed for iPad)
Had the same problem, testing an iOS app on macOS via TestFlight which previously worked, did recently stop working. But I found a setting in App Store Connect, under each testing group, that says Test iPhone and iPad Apps on Apple Silicon Macs. Enabling this setting made testing on macOS work again.
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Reply to 26.4 beta and RC versions are unable to be created on anything but 26.4 beta host OS
[quote='880896022, kthchew, /thread/819456?answerId=880896022#880896022, /profile/kthchew'] FB22286320 [/quote] Thanks for filing that. [quote='880953022, kthchew, /thread/819456?answerId=880953022#880953022, /profile/kthchew'] is it possible that your work Mac has access to an internal software update server … ? [/quote] It’s certainly possible, but I usually keep a tight reign on this Mac to prevent that sort of thing. Anyway, based on the fact that multiple folks on this thread are reporting this issue, I think it warrants investigation by the Virtualization team. If you’re hitting this, please file a bug with the details and then post the bug number here. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
Topic: App & System Services SubTopic: Core OS Tags:
1w
Reply to FSKit passthrough sample fails to mount
[quote='880826022, alexfs123, /thread/819160?answerId=880826022#880826022, /profile/alexfs123'] Shouldn't unmount attempt to close it automatically … ? [/quote] Well, sure, if that’s what’s actually going on here. My hope was that lsof would provide evidence either way. [quote='880826022, alexfs123, /thread/819160?answerId=880826022#880826022, /profile/alexfs123'] I already unmounted it [/quote] So repeating the same steps doesn’t reproduce the issue? Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
Topic: App & System Services SubTopic: Core OS Tags:
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Reply to Expected behavior of searchDomains
[quote='880876022, akshit_ak, /thread/814494?answerId=880876022#880876022, /profile/akshit_ak'] Based on the code you linked to, there might be a bug [/quote] OK. In that case my advice is that you file a bug with your evidence so that the relevant engineers can look at this. Please post your bug number, just for the record. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
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Reply to AXSpeech Thread Crash SEGV_ACCERR
Thanks for those crash reports. Are you able to find a JSON crash report (.ips) for this? If so, please post it, because it may allow me to learn more about the issue. In the absence of that then, yeah, at first blush this is looks like an Apple problem rather than a problem with your code. Consider the crashing thread from your first crash report: Thread 22 name: Thread 22 Crashed: 0 CoreFoundation … __CFCheckCFInfoPACSignature + 4 (CFRuntime.c:559) 1 CoreFoundation … CFRunLoopSourceSignal + 28 (CFRunLoop.c:4312) 2 Foundation … performQueueDequeue + 484 (NSThread.m:1063) 3 Foundation … __NSThreadPerformPerform + 88 (NSThread.m:1077) 4 CoreFoundation … __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 28 (CFRunLoop.c:1970) 5 CoreFoundation … __CFRunLoopDoSource0 + 172 (CFRunLoop.c:2014) 6 CoreFoundation … __CFRunLoopDoSources0 + 332 (CFRunLoop.c:2059) 7 CoreFoundation … __CFRunLoopRun + 840 (CFRunLoop.c:2969) 8 CoreFoundation … CFRunLoopRunSpecific + 572 (CFRunLoop.c:3434) 9 Foundation … -
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Reply to spctl --type install rejects notarized .pkg on macOS 26 Tahoe (26.3)
[quote='880810022, kappie, /thread/817887?answerId=880810022#880810022, /profile/kappie'] Here's the direct download link to the installer package: [/quote] That link doesn’t work for me (I get a 404). This: [quote='880810022, kappie, /thread/817887?answerId=880810022#880810022, /profile/kappie'] The productbuild --sign does emit Warning: unable to build chain to self-signed root [/quote] is very concerning. It suggests that the signature was created without the full certificate chain, which could easily cause problems like this. When signing code, rather than an installer package, this is actually a hard failure. I talk about it in detail in Resolving errSecInternalComponent errors during code signing and the associated Fixing an untrusted code signing certificate. So: You should definitely do what you can to investigate and resolve the unable to build chain to self-signed root warning. If that doesn’t pan out, reply back here with a download link that works and I’ll take a look. Share and Enjoy — Quinn “The
Topic: Code Signing SubTopic: Notarization Tags:
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Reply to macOS Tahoe 26.4 Beta 4: Rosetta deprecation warning not shown — bug or intended behavior?
[quote='880992022, shara7, /thread/818906?answerId=880992022#880992022, /profile/shara7'] Could you tell me whether these log entries … ? [/quote] No, sorry. I have limited time to spend on the forums, and I prefer to spend that time helping folks with code-level problems. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
Topic: App & System Services SubTopic: Core OS Tags:
1w
Reply to Securing XPC Daemon Communication from Authorization Plugin
[quote='881033022, robonaren, /thread/819553?answerId=881033022#881033022, /profile/robonaren'] Here are the specific requirement i've tried [/quote] So anchor apple generic is definitely wrong. Consider this quote from Code Signing Requirement Language: For Apple’s own code, signed by Apple, you can use the short form anchor apple For code signed by Apple, including code signed using a signing certificate issued by Apple to other developers, use the form anchor apple generic If your goal is security, you don’t want to mix these up! [quote='881053022, robonaren, /thread/819553?answerId=881053022#881053022, /profile/robonaren'] Here are the specific requirement i'm using from the Authorization Plugin (xpc client) [/quote] From the client? Maybe I’ve misunderstood this, but that seems backwards. You want to apply these constraints on the server for connections coming from the client. Consider this: % csreq -r '=anchor apple and (identifier
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Custom Reports GET API returning 403 Forbidden since March 16, 2026 — POST still works
Hi Apple Developer Community, Since March 16, 2026, our integration with the Apple Ads Campaign Management API (v5) is returning 403 Forbidden on all GET requests to the custom-reports endpoint, while POST requests to create reports continue to work without any issues. Environment API Version: v5 Base URL: https://api.searchads.apple.com/api/v5/ Authentication: OAuth 2.0 (Bearer token — token generation works fine) API User Role: API Account Manager What's broken GET /api/v5/custom-reports/63638557 → 403 Forbidden The response is raw HTML from Apple's gateway, not a JSON API error: 403 Forbidden 403 Forbidden Apple This indicates the request is being blocked at the reverse proxy / infrastructure level and never reaches the API application layer. A proper API-level authorization error would return JSON with messageCode and message fields. What still works POST creates report successfully POST /api/v5/custom-reports → 200 OK Response: { data: { id: 63638557, name: Impress
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My macOS app is unable to read a Managed Preferences plist unless the App Sandbox is disabled. Is there any solution to read the MDM plist file while the sandbox is still enabled?
I created two sample apps — one sandboxed and one non‑sandboxed. I tested reading Managed Preferences using bash commands, CFPreferencesCopyValue for a domain, and defaults read. Everything works correctly only when the sandbox is disabled in the entitlements. When the sandbox is enabled, I’m unable to read values from /Library/Managed Preferences/. Is there any supported way for a sandboxed macOS app to read an MDM-delivered preference plist under /Library/Managed Preferences/? Any guidance on the correct and Apple‑supported method would be appreciated.
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191
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1w
MPS SDPA Attention Kernel Regression on A14-class (M1) in macOS 26.3.1 — Works on A15+ (M2+)
Summary Since macOS 26, our Core ML / MPS inference pipeline produces incorrect results on Mac mini M1 (Macmini9,1, A14-class SoC). The same model and code runs correctly on M2 and newer (A15-class and up). The regression appears to be in the Scaled Dot-Product Attention (SDPA) kernel path in the MPS backend. Environment Affected Mac mini M1 — Macmini9,1 (A14-class) Not affected M2 and newer (A15-class and up) Last known good macOS Sequoia First broken macOS 26 (Tahoe) ? Confirmed broken on macOS 26.3.1 Framework Core ML + MPS backend Language C++ (via CoreML C++ API) Description We ship an audio processing application (VoiceAssist by NoiseWorks) that runs a deep learning model (based on Demucs architecture) via Core ML with the MPS compute unit. On macOS Sequoia this works correctly on all Apple Silicon Macs including M1. After updating to macOS 26 (Tahoe), inference on M1 Macs fails — either producing garbage output or crashing. The same binary, same .mlpackage, same inputs work correctly on M2+. O
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1
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0
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188
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1w
Apple continues to reject but no issue on our end
everything is working perfectly fine on my end and I continue to get this message, please help me navigate this. Review date: March 23, 2026 Review Device: iPad Air 11-inch (M3) Version reviewed: 1.0 Guideline 2.1(a) - Performance - App Completeness Issue Description The app exhibited one or more bugs that would negatively impact users. Bug description: When we tried to log in the app was returning to the login page. Review device details: Device type: iPad Air 11-inch (M3) OS version: iPadOS 26.3.1 Internet Connection: Active
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0
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37
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1w
Reply to TestFlight build visible on macOS but not installable: “Can only be tested on an iOS device” for Mac (Designed for iPad)
Had the same problem, testing an iOS app on macOS via TestFlight which previously worked, did recently stop working. But I found a setting in App Store Connect, under each testing group, that says Test iPhone and iPad Apps on Apple Silicon Macs. Enabling this setting made testing on macOS work again.
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1w
Reply to 26.4 beta and RC versions are unable to be created on anything but 26.4 beta host OS
[quote='880896022, kthchew, /thread/819456?answerId=880896022#880896022, /profile/kthchew'] FB22286320 [/quote] Thanks for filing that. [quote='880953022, kthchew, /thread/819456?answerId=880953022#880953022, /profile/kthchew'] is it possible that your work Mac has access to an internal software update server … ? [/quote] It’s certainly possible, but I usually keep a tight reign on this Mac to prevent that sort of thing. Anyway, based on the fact that multiple folks on this thread are reporting this issue, I think it warrants investigation by the Virtualization team. If you’re hitting this, please file a bug with the details and then post the bug number here. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
Topic: App & System Services SubTopic: Core OS Tags:
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1w
Reply to FSKit passthrough sample fails to mount
[quote='880826022, alexfs123, /thread/819160?answerId=880826022#880826022, /profile/alexfs123'] Shouldn't unmount attempt to close it automatically … ? [/quote] Well, sure, if that’s what’s actually going on here. My hope was that lsof would provide evidence either way. [quote='880826022, alexfs123, /thread/819160?answerId=880826022#880826022, /profile/alexfs123'] I already unmounted it [/quote] So repeating the same steps doesn’t reproduce the issue? Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
Topic: App & System Services SubTopic: Core OS Tags:
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1w
Reply to Expected behavior of searchDomains
[quote='880876022, akshit_ak, /thread/814494?answerId=880876022#880876022, /profile/akshit_ak'] Based on the code you linked to, there might be a bug [/quote] OK. In that case my advice is that you file a bug with your evidence so that the relevant engineers can look at this. Please post your bug number, just for the record. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
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1w
No Updates on Appeal
Hello, we have resubmitted app for Appeal about 10 days ago. There is neither any ticket created for appeal nor any mail is generated . How to track the status of appeal? How many days does Apple usually takes to work on an appeal?
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52
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1w
Reply to AXSpeech Thread Crash SEGV_ACCERR
Thanks for those crash reports. Are you able to find a JSON crash report (.ips) for this? If so, please post it, because it may allow me to learn more about the issue. In the absence of that then, yeah, at first blush this is looks like an Apple problem rather than a problem with your code. Consider the crashing thread from your first crash report: Thread 22 name: Thread 22 Crashed: 0 CoreFoundation … __CFCheckCFInfoPACSignature + 4 (CFRuntime.c:559) 1 CoreFoundation … CFRunLoopSourceSignal + 28 (CFRunLoop.c:4312) 2 Foundation … performQueueDequeue + 484 (NSThread.m:1063) 3 Foundation … __NSThreadPerformPerform + 88 (NSThread.m:1077) 4 CoreFoundation … __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 28 (CFRunLoop.c:1970) 5 CoreFoundation … __CFRunLoopDoSource0 + 172 (CFRunLoop.c:2014) 6 CoreFoundation … __CFRunLoopDoSources0 + 332 (CFRunLoop.c:2059) 7 CoreFoundation … __CFRunLoopRun + 840 (CFRunLoop.c:2969) 8 CoreFoundation … CFRunLoopRunSpecific + 572 (CFRunLoop.c:3434) 9 Foundation … -
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Reply to Strange crash in iOS AudioToolboxCore when using AVSpeechSynthesizer in iOS 16
Ah, I see you reanimated two different threads about this issue. I’ll respond over on the other one. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
Topic: Media Technologies SubTopic: Audio Tags:
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1w
Reply to spctl --type install rejects notarized .pkg on macOS 26 Tahoe (26.3)
[quote='880810022, kappie, /thread/817887?answerId=880810022#880810022, /profile/kappie'] Here's the direct download link to the installer package: [/quote] That link doesn’t work for me (I get a 404). This: [quote='880810022, kappie, /thread/817887?answerId=880810022#880810022, /profile/kappie'] The productbuild --sign does emit Warning: unable to build chain to self-signed root [/quote] is very concerning. It suggests that the signature was created without the full certificate chain, which could easily cause problems like this. When signing code, rather than an installer package, this is actually a hard failure. I talk about it in detail in Resolving errSecInternalComponent errors during code signing and the associated Fixing an untrusted code signing certificate. So: You should definitely do what you can to investigate and resolve the unable to build chain to self-signed root warning. If that doesn’t pan out, reply back here with a download link that works and I’ll take a look. Share and Enjoy — Quinn “The
Topic: Code Signing SubTopic: Notarization Tags:
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1w
Reply to Getting a basic URL Filter to work
[quote='880858022, KayleeSC, /thread/791352?answerId=880858022#880858022, /profile/KayleeSC'] added to the same bug [/quote] I see that. Thanks! Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
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1w
Reply to macOS Tahoe 26.4 Beta 4: Rosetta deprecation warning not shown — bug or intended behavior?
[quote='880992022, shara7, /thread/818906?answerId=880992022#880992022, /profile/shara7'] Could you tell me whether these log entries … ? [/quote] No, sorry. I have limited time to spend on the forums, and I prefer to spend that time helping folks with code-level problems. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
Topic: App & System Services SubTopic: Core OS Tags:
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1w
Reply to Securing XPC Daemon Communication from Authorization Plugin
[quote='881033022, robonaren, /thread/819553?answerId=881033022#881033022, /profile/robonaren'] Here are the specific requirement i've tried [/quote] So anchor apple generic is definitely wrong. Consider this quote from Code Signing Requirement Language: For Apple’s own code, signed by Apple, you can use the short form anchor apple For code signed by Apple, including code signed using a signing certificate issued by Apple to other developers, use the form anchor apple generic If your goal is security, you don’t want to mix these up! [quote='881053022, robonaren, /thread/819553?answerId=881053022#881053022, /profile/robonaren'] Here are the specific requirement i'm using from the Authorization Plugin (xpc client) [/quote] From the client? Maybe I’ve misunderstood this, but that seems backwards. You want to apply these constraints on the server for connections coming from the client. Consider this: % csreq -r '=anchor apple and (identifier
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1w
Custom Reports GET API returning 403 Forbidden since March 16, 2026 — POST still works
Hi Apple Developer Community, Since March 16, 2026, our integration with the Apple Ads Campaign Management API (v5) is returning 403 Forbidden on all GET requests to the custom-reports endpoint, while POST requests to create reports continue to work without any issues. Environment API Version: v5 Base URL: https://api.searchads.apple.com/api/v5/ Authentication: OAuth 2.0 (Bearer token — token generation works fine) API User Role: API Account Manager What's broken GET /api/v5/custom-reports/63638557 → 403 Forbidden The response is raw HTML from Apple's gateway, not a JSON API error: 403 Forbidden 403 Forbidden Apple This indicates the request is being blocked at the reverse proxy / infrastructure level and never reaches the API application layer. A proper API-level authorization error would return JSON with messageCode and message fields. What still works POST creates report successfully POST /api/v5/custom-reports → 200 OK Response: { data: { id: 63638557, name: Impress
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77
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1w