ci: Update MacOS to latest OS

[spencer-lunarg]

The macOS 12 runner image will be removed by December 3rd, 2024.
...
Jobs using the macos-12 YAML workflow label should be updated to macos-15, macos-14, macos-13, or macos-latest.

[SaschaWillems]

Thanks for the PR. Very much appreciated 👍🏻

[spencer-lunarg]

found architecture 'arm64', required architecture 'x86_64'

o no... @richard-lunarg @aitor-lunarg help here... my 🍎 knowledge doesn't go much farther than just updating YAML files

[SaschaWillems]

It might be possible that the newer MacOS images are now arm based instead of x86? Which would explain the error message. Don't know enough about Mac myself.

[richard-lunarg]

Yes, I've seen this error message. You are either building for arm64 and linking to x86_64 or vice-a-versa. If you are using prebuilt Qt binaries, the upgrade may be running now on an Apple Silicon machine and you will need to rebuilt the Qt libraries for Apple Silicon. Are you using qmake or cmake to build in your CI workflow (I am close to an idiot on CI stuff)? You may also be able to set a compiler flag or command line switch to build for x86_64 again. If you want to build both platforms, I have instructions from when I figured out how to build Qt5 as a dual platform static library (this is how I build caps viewer for the SDK, it's dual, x86_64/Apple Silicon).