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iOS testbed runner incompatible with GitHub Actions macos-15 runner. #137973

Description

@freakboy3742

Bug report

Bug description:

Microsoft's 20250811 macos-15 image update made some significant changes that are incompatible with CPython's iOS test runner.

This prevents the Cpython iOS testbed runner from operating on macos-15 machines in GitHub Actions, and in Azure Pipelines.

At this time, Microsoft's advice is to use the macos-14 image instead.

The Xcode project itself is able to run on the macos-15 image; however, something about the log streaming technique used by the testbed runner breaks the process of Xcode launching the simulator to run the test suite.

CPython versions tested on:

CPython main branch

Operating systems tested on:

Other

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Activity

  1. added
    type-bugAn unexpected behavior, bug, or error
    3.13only security fixes
    3.14bugs and security fixes
    3.15bugs and security fixes
    on Aug 19, 2025
  2. self-assigned this
    on Aug 21, 2025
  3. added a commit that references this issue on Aug 22, 2025
  4. added 2 commits that reference this issue on Aug 22, 2025
  5. added a commit that references this issue on Aug 22, 2025
  6. added a commit that references this issue on Aug 25, 2025
  7. added a commit that references this issue on Sep 9, 2025
  8. added 3 commits that reference this issue on Feb 3, 2026
  9. added 2 commits that reference this issue on Jun 12, 2026
  10. added 2 commits that reference this issue on Oct 2, 2026
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3.13only security fixes3.14bugs and security fixes3.15bugs and security fixesOS-iostype-bugAn unexpected behavior, bug, or error

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