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Core Image for depth maps & segmentation masks: numeric fidelity issues when rendering CIImage to CVPixelBuffer (looking for Architecture suggestions)
Hello All, I’m working on a computer-vision–heavy iOS application that uses the camera, LiDAR depth maps, and semantic segmentation to reason about the environment (object identification, localization and measurement - not just visualization). Current architecture I initially built the image pipeline around CIImage as a unifying abstraction. It seemed like a good idea because: CIImage integrates cleanly with Vision, ARKit, AVFoundation, Metal, Core Graphics, etc. It provides a rich set of out-of-the-box transforms and filters. It is immutable and thread-safe, which significantly simplified concurrency in a multi-queue pipeline. The LiDAR depth maps, semantic segmentation masks, etc. were treated as CIImages, with conversion to CVPixelBuffer or MTLTexture only at the edges when required. Problem I’ve run into cases where Core Image transformations do not preserve numeric fidelity for non-visual data. Example: Rendering a CIImage-backed segmentation mask into a larger CVPixelBuffer can cause l
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Reply to Limit IP Tracking keeps turing back on
Apps tested and showing this issue are Safari, Chrome, Mail to start. I would expect to disable Limit IP Tracking and it to remain disabled unless I enable it again. After doing some testing, I determined the possible issue. If an applications has public and private DNS records, looks likes the public DNS record will be used and route the traffic over via Apple Private Relay. When on local network I would expect the private DNS servers/records to be used.
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App Review Rejection – Guideline 2.1: “Create PIN” Not Responsive on iPad (iPhone-Only App)
Hi everyone, I’m looking for clarification regarding an App Review rejection under Guideline 2.1 – Performance – App Completeness. Apple reported the following issue: Bug description: “Create PIN” button was not responsive Review device: iPad Air 11-inch (M3) OS version: iPadOS 26.2.1 What’s confusing is the following: Observed behavior on our side The app has been tested extensively on: Multiple iPhone models iPad devices (including recent iPadOS versions) In all our testing: The Create PIN button is responsive The tap action triggers correctly The flow completes without errors At this point, we are unable to reproduce the issue described by App Review on either iPhone or iPad. iPhone-only intent vs iPad review The app is designed and optimized for iPhone usage only. However, the review was performed on an iPad device. If an app is available for download on iPad, is it always expected to function fully on iPad regardless of being phone-optimized? If iPad support is not intended, is explicitly disabl
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Reply to MacOS(Apple Silicon) IOKit driver for FPGA DMA transmission, kernel panic.
Hi Kevin, I haven't checked the code, but I'd expect that you'd need to be page aligned, with would be 16KB (not 4KB). I'm actually not sure why gen64IOVMSegments worked, though it's possible that using the native address size changed something. Ironically, I think this might have just worked if you'd gone straight to 8MB Let me summarize my current attempts: IODMACommand uses 1B, 4KB, or 16KB page alignment, and allocates IOVM address >32 bits by gen64IOVMSegments(). If the DMA transfer process continues, a kernel panic will occur. PanicSting is apciec[pcic0-bridge]::handleInterrupt: Request address is greater than 32 bits. Using gen32IOVMSegments() will return kIOReturnMessage TooLarge. If I don't set the maximum value of 8M, the result will still be the same, so I think it may not be related to the maximum value. Based on my current attempts, I am focusing on these two issues: Does Apple M silicon not allocate<=32-bit bus addresses to third-party PCIe device (FPGA)? Can Apple M sili
Topic: App & System Services SubTopic: Drivers Tags:
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Reply to launchd StartCalendarInterval behavior changed
Well I committed the cardinal sin of not eliminating enough variables before debugging. Time to set the record straight! Here's what I learned: Above, I was wrong: in fact, macOS 26, 15, 12 (and earlier!) all DO exhibit this behavior: running a CalendarInterval scheduled job when MacBook is sleeping. The differentiator is not the OS version but the state of the lid -- lid open while asleep and you get the DarkWake behavior: launchd runs your job, it may still get suspended until a full wake Lid closed while asleep - behavior is as described here -- your job does not run in any way until the lid is opened I don't know what desktop Macs do here (no lid!). There is a PowerNap boolean key used by Apple in /System/Library/LaunchDaemons/ *.plists, but I wasn't able to suss out its behavior, and it only seems to be used in a com.apple.xpc.activity dictionary. If you'd like to give this a go for your own devices, dear reader, I wish you luck. I was mis-attributing OS version to this launchd behavior, when it
Topic: App & System Services SubTopic: Core OS Tags:
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Reply to launchd StartCalendarInterval behavior changed
Thank you for your insight - that's a good piece of the puzzle! I found the DarkWake session: WWDC 2012, Session 711, Power Management with Ethan Bold and Soren Spies. Sadly, I can't blame DarkWake because it has been around since 2012, but I only see this unexpected wake on newer macOS. Since I'm using StartCalendarInterval on different versions, here's what I see: macOS 12 and earlier behave as expected; sleep through the CalendarInterval macOS 15 & 26 dark wake at the CalendarInterval Perhaps Apple changed launchd to be capable of scheduling a dark wake. My guess is there is a Launch[Agent|Daemon] *.plist key that can be used to change this behavior. I'll fire up BBEdit and go spelunking through /System/Library/LaunchDaemons/ to see if I can find a relevant key. Of course, if this was documented, I wouldn't be left wondering if I should file a bug report!
Topic: App & System Services SubTopic: Core OS Tags:
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STUCK ON PAYMENT, NO UPDATE
I have registered for Apple developer program since December and up until now, I am still stuck on payment. I have tried several credit cards but no response. they said it takes 48 days, but mine is over 2 months now. I have sent a message to support and no response. pls what is happening and why is my experience different? why is Apple not debiting my cards and why is support ghosting me. I registered using the official Apple developer enrollment website
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How to open main app from ShieldActionExtension?
Hi! I'm building a Screen Time management app using FamilyControls and ManagedSettings. When a user taps the primary button on a ShieldActionExtension, I need to open my main app to guide them through an intervention exercise. Other approved App Store apps like Jomo - Screen Time Blocker do exactly this: tapping their shield's primary button opens the main Jomo app directly. Screen recording: https://drive.google.com/file/d/15yubtTdTkFskGCIaAw_HGB57-boHPl3a/view?usp=sharing I've tried: URL schemes (UIApplication.shared.open() unavailable in extensions) Universal links Local notifications (works, but adds an extra tap) NSUserActivity Is there a supported API I'm missing? Or another accepted solution? Any guidance is appreciated.
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External payment providers for users in Russia when In-App Purchases are unavailable
Hello, I have a question regarding payments for iOS apps in Russia. Currently, In-App Purchases are not available or do not work for many users in Russia, making it impossible for them to purchase digital subscriptions or digital content via Apple IAP. Is it allowed to: use an external payment provider available only in Russia, show this option only to users located in that region, and unlock access to digital content after payment is completed outside the app (for example, via a web page), in cases where Apple IAP is technically unavailable? Is there any official guidance or exception for regions where Apple IAP cannot be used? Thank you.
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