Ruby 2.7 fails to install on newer default (m4pro medium) w/ new min Xcode

[iBotPeaches]

Orb version: circleci/macos@2

What happened:

After our runners moved to the new m4pro by default a few days ago, we saw a new failure that we couldn't switch/install Ruby 2.7 anymore for some of our older tests. This test was previously a Ruby 2.7 on Xcode 13.4 with the older m1-medium-g1 instance.

The step of executing this orb failed with not much debug output.

Exited with code exit status 1

Workflow source: https://github.com/fastlane/fastlane/blob/master/.circleci/config.yml#L61
Failure run: https://app.circleci.com/pipelines/github/fastlane/fastlane/7492/workflows/267b8f31-78a1-44c2-9954-3ab1cf868f3b/jobs/112486

Expected behavior:

Hopefully work with an install or tell me its too old and I move on.

refs: fastlane/fastlane#29802 and I accidentally opened this in Ruby orb repo first: CircleCI-Public/ruby-orb#172 (comment)

[marboledacci]

For now I would recommend you to move back. Your test was using an old ruby version with an old xcode version to work, so many things can break with such a change.
We are testing this orb now with the latest m4 versions to find and fix any possible problem.

[iBotPeaches]

Thanks I did move back in fastlane/fastlane@b3c8965 - we will be forced back to m4 I guess in late Feb 2026 so just getting ahead of it.