Popping Sound

Hi, I am curious about if hyperthreading is enabled/disabled on my macbook pro M1 or M4. Howto figure out? I am using macOS 15.5. Further, I develop a multi-threaded audio sequencer that creates threads per instrument. I use vector operations to increase performance. I recognized lowering synchronization rate from 250 Hz to 60 Hz gives additional performance advantages. Howto programmatically check if Hyperthreading is enabled/disabled and howto enable/disable it programmatically? After some research I found sysctl() and nvram SMTDisable=%01. https://support.apple.com/en-us/101870 Can anyone provide me an Objective C example? regards, Joël

Hi, My app has an IAP and the view that let user to purchase is simply a ProductView. The purchase flow should be handled by the ProductView itself. I have tested the app with xcode storekit configuration, xcode run with sandbox account and also TestFlight environment as well. The purchase is triggered and the app feature is unlocked after purchase. However, I keep getting app review team feedback with the following problem: Bug description: the purchase button is greyed out after we tapped on it, however, there's no purchase flow popped up I have tried multiple things. Building with xcode cloud, removing the storekit configuration from the build scheme. But none can get the app review team to get through the problem. The IAP is not available in certain region. In that case, the app will show a message. However, the app review attached an screenshot which shows the product view. The view that allow users to purchase if let product = store.products.first(where: { $0.id == com.***.xxxxxxx }) { // If th

Hi! My product SKU has been approved for Advanced Commerce API. I successfully receive a purchase pop-up with the correct information. However, I am still having issues with completing the purchase. I always receive Unauthorize error when I confirm the purchase (subscription in my case; see the screenshot). I am using the node.js server library to sign the request. I made sure that the account is a valid account enabled for Sandbox. Logs unfortunately don't indicate any further detail. Thanks for your advice! We've been stuck on this for a while now and would appreciate your help. Marek

Dear Sirs, I'd like to add an icon to my audio driver based on AudioDriverKit. This icon should show up left of my audio device in the audio devices dialog. For an Audio Server Plugin I managed to do this using the property kAudioDevicePropertyIcon and CFBundleCopyResourceURL(...) but how would you do this with AudioDriverKit? Should I use IOUserAudioCustomProperty or IOUserAudioControl and how would I refer to the Bundle? Is there an example available somewhere? Thanks and best regards, Johannes

Hey, I have AirPlay speakers that I want to use as permanent speakers on my Apple TV. It is possible since tvOS 26. I want to delete the delay from the connection to the speakers and tried out the wireless audio calibration, but then the TV speakers go on and it only works there, not on the speakers. Does anyone have a solution?

Hi all, I'm looking for guidance or experiences from others who’ve run into this issue. I'm developing a series of educational apps that teach different languages from English, using a simple flashcard-based format. Each app is fully offline, has no ads, no subscriptions, and contains native audio and culturally relevant images for that specific language. Each language pack (audio + images + data) is around 50MB, and I’m planning to support 50 languages. Because of size constraints and my offline-first approach, it’s not feasible to combine all languages into a single app. To stay user-friendly and efficient: Each app contains only one language. Each has its own name and icon (e.g., “Babel Bash Chinese ”, “Babel Bash Thai”). All use the same visual structure (by design) for brand consistency and usability. Despite this, I’ve had an app rejected under Guideline 4.3(a) – Spam, with the reasoning that it duplicates the functionality of another app I've submitted (even though the language, audio

I'm developing a safety-critical monitoring app that needs to fetch data from government APIs every 30 minutes and trigger emergency audio alerts for threshold violations. The app must work reliably in background since users depend on it for safety alerts even while sleeping. Main Challenge: iOS background limitations seem to prevent consistent 30-minute intervals. Standard BGTaskScheduler and timers get suspended after a few minutes in background. Question: What's the most reliable approach to ensure consistent 30-minute background monitoring for a safety-critical app where missed alerts could have serious consequences? Are there special entitlements or frameworks for emergency/safety applications? The app needs to function like an alarm clock - working reliably even when backgrounded with emergency audio override capabilities.