I seem to be hitting a 16GB memory limit for my iPadOS app running under macOS on Apple Silicon. I can't find this limit documented or discussed anywhere else, so I'm posting here in the hopes of getting confirmation that it's official (as opposed to coincidental) and seeing if there's a way to lift or remove this limit. Background I have an iOS / iPadOS app that uses concurrency to solve puzzles. I have a ******* Test Puzzle that I use to stress-test the app. The ******* Test Puzzle results in millions of NSBlockOperations on a NSOperationQueue with a concurrency limit of ProcessInfo.processInfo.activeProcessorCount - 1 The app also uses Swift "copy on write" semantics to give each operation its own variation of the game model struct, so there are corresponding Swift.***Storage objects as well. Each of these objects is small (272 bytes for the block operations) but collectively, they add up to several GB. During a successful run, the peak memory usage of the app exceeds 50GB, as measured by Instruments and macOS Activity Monitor. When running the iPad app on the Apple Silicon Mac, it receives a memory warning (AppDelegate.applicationDidReceiveMemoryWarning) when usage hits 16GB. The app normally halts the solver and displays an error when that happens, but if I disable the watchdog, it crashes just as it would on a real iPad. Where it works and doesn't The app does not run out of memory when I build for Mac Catalyst or the Xcode Simulator: Hardware  Xcode Simulator   Mac Catalyst   "Designed for iPad"  2018 Mac mini, Core i3, 64GB RAM   ✓   ✓   (n/a)  2023 MacBook Pro, M2, 96GB RAM   ✓   ✓   ❌ Note: the choice of simulator is irrelevant. Even an iPod touch simulator runs to completion. What does the kernel say? In both the Catalyst and Simulator scenarios, os_proc_available_memory() reports 0 which I assume means "no limit." Whereas, under "Designed for iPad" it reports 17164220800 i.e. 16GB. So I assume this is a deliberate limit… I just see no documentation around it. What I've tried Increased Memory Limit I've tried adding the com.apple.developer.kernel.increased-memory-limit entitlement to the app. No change. — I've verified that the entitlement shows up in Xcode under Signing & Capabilities. — I've verified that the entitlement shows up in my developer account under Certificates, Identifiers & Profiles. — I've tried Quinn's trick of adding the additional Private VPN entitlement to the Mac build just to make sure Xcode picks it up. Extended Virtual Addressing I've tried adding the com.apple.developer.kernel.extended-virtual-addressing entitlement to the app. Made it worse. The app now runs out of memory at ~3.2GB. Note I don't see a forum tag specifically for questions related to "Designed for iPad apps running on Apple Silicon Macs," but please educate me if I missed one.