Xcode 26 CompileMetalFile failed

Question

Created Oct ’25

Replies 4

Boosts 1

Participants 4

"EnableLiveAssetServerV2-com.apple.MobileAsset.MetalToolchain" = on;

ProductName: macOS ProductVersion: 26.0.1 BuildVersion: 25A362

The MetalToolchain is installed, however I keep getting error that MetalToolchain cannot be found by the Xcode

"Command CompileMetalFile failed with a nonzero exit code" error: error: cannot execute tool 'metal' due to missing Metal Toolchain; use: xcodebuild -downloadComponent MetalToolchain

❯ xcodebuild -downloadComponent MetalToolchain 2025-10-31 11:18:29.004 xcodebuild[6605:45524] IDEDownloadableMetalToolchainCoordinator: Failed to remount the Metal Toolchain: The file “com.apple.MobileAsset.MetalToolchain-v17.1.324.0.k9JmEp” couldn’t be opened because you don’t have permission to view it. Beginning asset download... 2025-10-31 11:18:29.212 xcodebuild[6605:45523] IDEDownloadableMetalToolchainCoordinator: Failed to remount the Metal Toolchain: The file “com.apple.MobileAsset.MetalToolchain-v17.1.324.0.k9JmEp” couldn’t be opened because you don’t have permission to view it. Downloaded asset to: /System/Library/AssetsV2/com_apple_MobileAsset_MetalToolchain/4ab058bc1c53034b8c0a9baca6fba2d2b78bb965.asset/AssetData/Restore/022-17211-415.dmg Done downloading: Metal Toolchain 17A324.

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Answer 1

Apple Staff OP

Apple

Oct ’25

Hey @krzyzanowskim , the last message of the log seems to confirm that the 17A324 metal toolchain got downloaded.

Could you also share the results from?

xcodebuild -showComponent metalToolchain ; xcrun -f metal ; xcrun metal --version

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Answer 2

krzyzanowskim OP

Oct ’25

Sure:

❯ xcodebuild -showComponent metalToolchain ; xcrun -f metal ; xcrun metal --version
2025-10-31 19:42:19.179 xcodebuild[11856:231862]  IDEDownloadableMetalToolchainCoordinator: Failed to remount the Metal Toolchain: The file “com.apple.MobileAsset.MetalToolchain-v17.1.324.0.Qp6DBA” couldn’t be opened because you don’t have permission to view it.
2025-10-31 19:42:19.414 xcodebuild[11856:231864]  IDEDownloadableMetalToolchainCoordinator: Failed to remount the Metal Toolchain: The file “com.apple.MobileAsset.MetalToolchain-v17.1.324.0.Qp6DBA” couldn’t be opened because you don’t have permission to view it.
2025-10-31 19:42:19.417 xcodebuild[11856:231860]  IDEDownloadableMetalToolchainCoordinator: Failed to remount the Metal Toolchain: The file “com.apple.MobileAsset.MetalToolchain-v17.1.324.0.Qp6DBA” couldn’t be opened because you don’t have permission to view it.
Asset Path: /System/Library/AssetsV2/com_apple_MobileAsset_MetalToolchain/4ab058bc1c53034b8c0a9baca6fba2d2b78bb965.asset/AssetData
Build Version: 17A324
Status: installed
Toolchain Search Path: /private/var/run/com.apple.security.cryptexd/mnt/com.apple.MobileAsset.MetalToolchain-v17.1.324.0.Qp6DBA
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/metal
error: error: cannot execute tool 'metal' due to missing Metal Toolchain; use: xcodebuild -downloadComponent MetalToolchain

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Answer 3

DTS Engineer OP

Apple

Oct ’25

What happens when you try running the following command in the terminal:

xcodebuild -downloadComponent metalToolchain

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Answer 4

DenisDelbecq OP

1d

I also have the same problem on a MacStudio M1Max (and not on a MBP M1Max) after upgrading to Xcode 26.1.1: no MetalToolchain accessible from this application. Running on Tahoe 26.1

Running today xcodebuild -downloadComponent metalToolchain gives:

`Beginning asset download...
Downloaded asset to: /System/Library/AssetsV2/com_apple_MobileAsset_MetalToolchain/68d8db6212b48d387d071ff7b905df796658e713.asset/AssetData/Restore/022-20369-066.dmg
Done downloading: Metal Toolchain 17B54.`

Then when I run "xcrun metal --version", I got an error message:

error: error: cannot execute tool 'metal' due to missing Metal Toolchain; use: xcodebuild -downloadComponent MetalToolchain

Last when I run: "xcodebuild -showComponent metalToolchain", I got:

2025-12-12 18:34:14.045 xcodebuild[27394:1591467]  IDEDownloadableMetalToolchainCoordinator: Failed to remount the Metal Toolchain: The file “com.apple.MobileAsset.MetalToolchain-v17.2.54.0.BttmuJ” couldn’t be opened because you don’t have permission to view it.
2025-12-12 18:34:14.339 xcodebuild[27394:1591469]  IDEDownloadableMetalToolchainCoordinator: Failed to remount the Metal Toolchain: The file “com.apple.MobileAsset.MetalToolchain-v17.2.54.0.BttmuJ” couldn’t be opened because you don’t have permission to view it.
2025-12-12 18:34:14.341 xcodebuild[27394:1591468]  IDEDownloadableMetalToolchainCoordinator: Failed to remount the Metal Toolchain: The file “com.apple.MobileAsset.MetalToolchain-v17.2.54.0.BttmuJ” couldn’t be opened because you don’t have permission to view it.
Asset Path: /System/Library/AssetsV2/com_apple_MobileAsset_MetalToolchain/68d8db6212b48d387d071ff7b905df796658e713.asset/AssetData
Build Version: 17B54
Status: installed
Toolchain Search Path: /private/var/run/com.apple.security.cryptexd/mnt/com.apple.MobileAsset.MetalToolchain-v17.2.54.0.BttmuJ

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