MetalToolchain fail installation xcode 26.0 beta 5, tahoe 26.0

Question

Created Aug ’25

Replies 6

Boosts 0

Participants 5

Failed fetching catalog for assetType (com.apple.MobileAsset.MetalToolchain), serverParameters ({ RequestedBuild = 17A5295f; }) Domain: DVTDownloadsUtilitiesErrorDomain Code: -1 User Info: { DVTErrorCreationDateKey = "2025-08-08 07:59:24 +0000"; }

Failed fetching catalog for assetType (com.apple.MobileAsset.MetalToolchain), serverParameters ({ RequestedBuild = 17A5295f; }) Domain: DVTDownloadsUtilitiesErrorDomain Code: -1

Download failed due to not being able to find the host. (Catalog download for com.apple.MobileAsset.MetalToolchain) Domain: com.apple.MobileAssetError.Download Code: 59 User Info: { checkConfiguration = 1; }

System Information

macOS Version 26.0 (Build 25A5327h) Xcode 26.0 (24198.5) (Build 17A5295f) Timestamp: 2025-08-08T08:59:24+01:00

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Answer 1

Hebert OP

Aug ’25

Can someone help, please? I cannot run the solution at all

0

Answer 2

Hebert OP

Aug ’25

I did follow https://developer.apple.com/documentation/xcode/downloading-and-installing-additional-xcode-components and tried

xcodebuild -downloadComponent metalToolchain -exportPath ~/Downloads

But, same

0

Answer 3

mtnMobile OP

4w

So the problem is a few threads reported this about 48 hours ago. Yesterday an 'Apple' person dropped on the threads it was 'fixed' but I have not been able to fix it with anything I've tried.

The struggle is real. :-(

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Answer 4

Hebert OP

4w

Yes, I have tried different ways, but nothing works

0

Answer 5

Apple Staff OP

Apple

3w

Hi, Please try deleting the following sudo defaults, if they exist:

sudo defaults delete com.apple.MobileAsset EnableLiveAssetServerV2-com.apple.MobileAsset.MetalToolchain
sudo defaults delete com.apple.MobileAsset PallasUrlOverrideV2-com.apple.MobileAsset.MetalToolchain
sudo defaults delete com.apple.MobileAsset MobileAssetAssetAudience-com.apple.MobileAsset.MetalToolchain

and then try to download:

xcodebuild -downloadComponent metalToolchain

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Answer 6

jayson012 OP

3w

Deleting defaults did not help on my end. The issue was resolved in Xcode 26 Beta 4, but it has returned in Beta 5.

Additionally, xcrun metal -v consistently produces:

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

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