[raulcd]

Rationale for this change

macos-14 runner is retired by GitHub:
https://github.blog/changelog/2026-10-01-github-actions-macos-14-runner-image-retirement/

What changes are included in this PR?

Bump all our macos-14 jobs to macos-26 and the matlab jobs for macos-15-intel to macos-26-intel too.

Are these changes tested?

Yes via CI

Are there any user-facing changes?

No, only bumping runners.

Was AI used for this PR?

In accordance to the AI generation guidelines, please disclose below whether and how AI was used in this PR.

PR code and description written by:

• Human
• AI

Reviewed before submission by:

• Human
• AI
• Not reviewed

• GitHub Issue: [CI] CI jobs fail due to macOS 14 runners being retired as GitHub runners #55426

[raulcd]

@github-actions crossbow submit matlab

[github-actions]

Revision: 7a365b1

Submitted crossbow builds: ursacomputing/crossbow @ actions-f26a05d5c5

Task	Status
matlab

[raulcd]

The failure is unrelated and is related to a new AWS SDK version from my understanding:

/Users/runner/work/arrow/arrow/cpp/src/arrow/filesystem/test_util.cc:159: Failure
Expected equality of these values:
  info.mtime()
    Which is: 2026-11-06 15:39:44.000000000
  mtime
    Which is: 2026-11-06 15:39:44.670000000
For path 'AB/CD/ghi'

Previously it dropped milliseconds but now it doesn't we should relax this check but we can do on a separate issue/PR. The aws-sdk-cpp issue:

• Preserving millisecond precision in DateTime parser aws/aws-sdk-cpp#3934

And the versions used:

• main, macos-14: Found AWS SDK for C++, Version: 1.11.870
• this PR, macos-26: Version: 1.11.915

[Copilot]

🟡 Changes recommended

The MATLAB packaging jobs omit MACOSX_DEPLOYMENT_TARGET, so moving to macOS 26 risks raising the bundled libraries’ minimum OS version and breaking compatibility with older macOS releases.

1 open issue

• Set the macOS deployment target for MATLAB and Arrow builds · New

What changed in this PR

Updates macOS CI runners to address the retirement of macOS 14 reported in #55426.

Changes:

• Moves ARM64 C++, Python, and MATLAB jobs to macOS 26.
• Moves the JNI macOS job to macOS 26.
• Updates Intel MATLAB jobs, including toolbox packaging, to macOS 26 Intel.

File	Description
dev/​tasks/​matlab/​github.yml	Updates both macOS runners used for MATLAB toolbox packaging.
.github/​workflows/​python.yml	Updates the ARM64 Python runner.
.github/​workflows/​matlab.yml	Updates ARM64 and Intel MATLAB runners.
.github/​workflows/​cpp.yml	Updates the ARM64 C++ runner.
.github/​workflows/​cpp_extra.yml	Updates the JNI macOS runner.

_{Review effort: Balanced}

[raulcd]

@github-actions crossbow submit matlab

[github-actions]

Revision: c99de6b

Submitted crossbow builds: ursacomputing/crossbow @ actions-f1dff3c3d7

Task	Status
matlab

[Copilot]

🟢 Approval recommended

No active review issues are recorded for the macOS CI runner updates.

No open issues 🎉

1 resolved since last review

• Set the macOS deployment target for MATLAB and Arrow builds

_{Review effort: Balanced}

[tadeja]

The failure is unrelated and is related to a new AWS SDK version from my understanding:

/Users/runner/work/arrow/arrow/cpp/src/arrow/filesystem/test_util.cc:159: Failure
Expected equality of these values:
  info.mtime()
    Which is: 2026-11-06 15:39:44.000000000
  mtime
    Which is: 2026-11-06 15:39:44.670000000
For path 'AB/CD/ghi'

Previously it dropped milliseconds but now it doesn't we should relax this check but we can do on a separate issue/PR.

It looks like this issue:

• [C++] TST: TestS3FSGeneric.GetFileInfoSelector due to milliseconds with new aws bindings #55356

[Copilot]

🟢 Approval recommended

There are no active review issues for the macOS CI runner updates.

No open issues 🎉

_{Review effort: Balanced}

[kou]

+1