Title: Xcode 27 beta 27A5194q: aimodelc reports “Core AI requires the Metal Toolchain” although Metal Toolchain is installed Description: I am trying to compile a Core AI asset using Xcode 27 beta on macOS 27. CoreAI.framework is available and the Metal Toolchain component is installed, but aimodelc refuses to compile with: error: Core AI requires the Metal Toolchain. note: Download it from Xcode > Settings > Components > Other Components. Environment: macOS 27 beta Xcode 27.0 beta Xcode build: 27A5194q Metal Toolchain installed build: 27A5194o Apple Silicon Mac Diagnostics: xcodebuild -version reports: Xcode 27.0 Build version 27A5194q xcodebuild -showComponent MetalToolchain -json reports: { "buildVersion": "27A5194o", "status": "installed", "toolchainIdentifier": "com.apple.dt.toolchain.Metal.32023.917", "toolchainSearchPath": "/private/var/run/com.apple.security.cryptexd/mnt/com.apple.MobileAsset.MetalToolchain-v27.1.5194.15.4aqDVJ" } The actual tools resolve: xcrun --find aimodelc /Applications/Xcode-beta.app/Contents/Developer/usr/bin/aimodelc xcrun --find coreai-build /var/run/com.apple.security.cryptexd/mnt/com.apple.MobileAsset.MetalToolchain-v27.1.5194.15.4aqDVJ/Metal.xctoolchain/usr/bin/coreai-build xcrun --find metallib /var/run/com.apple.security.cryptexd/mnt/com.apple.MobileAsset.MetalToolchain-v27.1.5194.15.4aqDVJ/Metal.xctoolchain/usr/bin/metallib Reproduction: Install Xcode 27 beta build 27A5194q. Install Metal Toolchain from Xcode > Settings > Components > Other Components. Confirm xcodebuild -showComponent MetalToolchain -json reports Metal Toolchain installed. Attempt to compile a Core ML package to Core AI: xcrun aimodelc compile --output /private/tmp/vesta-coreai-smoke/ManualPatchCheck.coreai /private/tmp/vesta-coreai-smoke/AFM27CoreAISmoke.mlpackage Actual result: aimodelc fails immediately: error: Core AI requires the Metal Toolchain. note: Download it from Xcode > Settings > Components > Other Components. Expected result: aimodelc should recognize the installed Metal Toolchain and compile the Core AI asset, or Xcode should provide a Metal Toolchain component compatible with Xcode build 27A5194q. Additional details: Running: xcodebuild -downloadComponent MetalToolchain downloads and installs Metal Toolchain 27A5194o. Running: xcodebuild -downloadComponent MetalToolchain -buildVersion 27A5194q fails with: xcodebuild: error: Failed fetching catalog for assetType (com.apple.MobileAsset.MetalToolchain), serverParameters ({ RequestedBuild = 27A5194q; }) This suggests Apple’s component catalog currently provides Metal Toolchain 27A5194o while Xcode is build 27A5194q, and aimodelc does not accept this installed component as compatible. Please confirm whether Metal Toolchain 27A5194o is intended to work with Xcode 27A5194q. If not, please publish the matching Metal Toolchain component or adjust aimodelc/component compatibility detection.

I've tried creating a Lora adapter using the example dataset, scripts as part of the adapter_training_toolkit_v26_0_0 (last available) on MacOs 26 Beta 6. import SwiftUI import FoundationModels import Playgrounds #Playground { // The absolute path to your adapter. let localURL = URL(filePath: "/Users/syl/Downloads/adapter_training_toolkit_v26_0_0/train/test-lora.fmadapter") // Initialize the adapter by using the local URL. let adapter = try SystemLanguageModel.Adapter(fileURL: localURL) // An instance of the the system language model using your adapter. let customAdapterModel = SystemLanguageModel(adapter: adapter) // Create a session and prompt the model. let session = LanguageModelSession(model: customAdapterModel) let response = try await session.respond(to: "hello") } I get Adapter assets are invalid error. I've added the entitlements Is adapter_training_toolkit_v26_0_0 up to date?

I can no longer achieve 100% ANE usage since upgrading to MacOS26 Beta 5. I used to be able to get 100%. Has Apple activated throttling or power saving features in the new Betas? Is there any new rate limiting on the API? I can hardly get above 3w or 40%. I have a M4 Pro mini (64GB) with High Power energy setting. MacOS 26 Beta 5.

I'm running MacOs 26 Beta 5. I noticed that I can no longer achieve 100% usage on the ANE as I could before with Apple Foundations on-device model. Has Apple activated some kind of throttling or power limiting of the ANE? I cannot get above 3w or 40% usage now since upgrading. I'm on the high power energy mode. I there an API rate limit being applied? I kave a M4 Pro mini with 64 GB of memory.