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CI: download Metal toolchain on xcode-27 - #5
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Matches PrivateMusic2 — Xcode 27 hosted runners omit the Metal toolchain, which breaks Telegram MetalCompile (NV12VideoShaders). Co-authored-by: D3C0Y <decoder-dev@users.noreply.github.com>
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Summary
Xcode 27 GitHub runners need
xcodebuild -downloadComponent MetalToolchain(same step as PrivateMusic2). Without it Telegram’s Metal shaders fail withcannot execute tool 'metal'.