Dropping Intel Mac to Tier 2

hugovk · August 20, 2025, 12:52pm

Update: the PR has been merged, and Intel macOS (aka x86_64-apple-darwin) is now tier 2:

We’re still testing macos-13 on the CI, and I suggest we keep it there until GH pulls the plug (some time between 1st September and 14th November), as it’ll help us surface failures earlier.

But when it does go away, here’s a PR that’s ready to merge and minimise the disruption:

github.com/python/cpython

gh-137638: Remove macos-13 from GitHub Actions

main ← hugovk:3.15-rm-macos-13

opened 12:20PM - 20 Aug 25 UTC

hugovk

+3 -26

GitHub Actions will be removing `macos-13` between September and November, and b…ecause that was the Intel runner (`macos-14` and `macos-15` are Apple Silicon), we've dropped Intel macOS (x86_64-apple-darwin) to tier 2 support: * https://discuss.python.org/t/dropping-intel-mac-to-tier-2/102100 * https://github.com/python/peps/pull/4548 * https://peps.python.org/pep-0011/#tier-2 I suggest we keep testing on `macos-13` whilst it's available, as it'll help surface failures sooner. But because the removal window is quite long ("This process will begin September 1, 2025, and the image will be fully retired on November 14, 2025"), here's a PR. Whenever `macos-13` is actually removed, this should be ready to merge, and minimise the disruption. * Issue: gh-137638