Upgrade from macos-13

[radarhere]

The macOS 13 runner image will soon start closing down - https://github.blog/changelog/2025-09-19-github-actions-macos-13-runner-image-is-closing-down/

There is a new macos-15-intel label that we can use instead, with two caveats

• trying to use it for iOS results in an error

Testing failed:
iOSTestbed encountered an error (Failed to prepare device 'Clone 1 of iPhone 16e' for impending launch. (Underlying Error: No matching device (5C6CB0A3-D0E1-465A-B035-84E8CB59187A) in set at /Users/runner/Library/Developer/XCTestDevices))

so instead I've switched to macos-14.

• you will notice that the macOS jobs are failing here. Updated FreeType to 2.14.1 on Windows #9206 is required to fix them.

[hugovk]

• trying to use [macos-15-intel] for iOS results in an error

Testing failed:
iOSTestbed encountered an error (Failed to prepare device 'Clone 1 of iPhone 16e' for impending launch. (Underlying Error: No matching device (5C6CB0A3-D0E1-465A-B035-84E8CB59187A) in set at /Users/runner/Library/Developer/XCTestDevices))

so instead I've switched to macos-14.

This means switching from Intel to Apple Silicon, so the build is emulated and not tested. Anything else of note?

cc @freakboy3742

[freakboy3742]

I haven't tried anything on the macOS-15-intel runner yet; the press release certainly made it sound like it should be a drop-in replacement, but that's evidently not the case.

The error is very similar to what is happening on the macOS-15 ARM runners, though; so it's possible this might be fixed by the changes to the iOS testbed that will be in the next iOS binary support releases.