[gragusa]

The macos-latest runner is on an Apple Silicon machine (macos-26-arm64). Because the matrix requests x64, setup-julia installs x64 Julia and runs it under Rosetta.

Since Metal 1.12.0 was released, the Julia 1.10 / macOS / x64 job crashes while precompiling Metal, at using Metal in test/runtests.jl, before any test runs:

    JIT session error: Symbols not found: [ ___dso_handle ]
    signal (11.1): Segmentation fault: 11
    in expression starting at .../Metal/src/Metal.jl:20

Metal.jl supports only Apple Silicon anyway, so the x64 macOS job never exercised the Metal extension. This PR runs the macOS jobs on aarch64 and keeps Ubuntu on x64.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
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Additional details and impacted files

@@           Coverage Diff           @@
##             main      #89   +/-   ##
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  Coverage        ?   74.91%           
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  Files           ?       12           
  Lines           ?     1244           
  Branches        ?        0           
=======================================
  Hits            ?      932           
  Misses          ?      312           
  Partials        ?        0           

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