fix Qt5 build on CI for MacOS which requires x86_64

[bebuch]

The Qt5 build in the CI is broken, because Qt5 is provided for x86_64 only, while current macos runners support arm64 only. Setting MacOS to version 13 should fix this until it falls out of GitHub Support.

References:

• Problem with macos-latest jurplel/install-qt-action#238
• https://github.com/faaxm/spix/blob/master/.github/workflows/build.yml

[bebuch]

The CMake build on MacOS works again with the change to macos-13. Unfortunately, there is a new problem with the QMake build on MacOS.

qmake
  make
  shell: /bin/bash -e {0}
  env:
    CXXFLAGS: -Wall -Wextra -pedantic -Werror
    MAKEFLAGS: -j3
    pythonLocation: /Users/runner/hostedtoolcache/Python/3.11.9/x64
    PKG_CONFIG_PATH: /Users/runner/hostedtoolcache/Python/3.11.9/x64/lib/pkgconfig:/Users/runner/work/SingleApplication/Qt/6.5.0/macos/lib/pkgconfig
    Python_ROOT_DIR: /Users/runner/hostedtoolcache/Python/3.11.9/x64
    Python2_ROOT_DIR: /Users/runner/hostedtoolcache/Python/3.11.9/x64
    Python3_ROOT_DIR: /Users/runner/hostedtoolcache/Python/3.11.9/x64
    Qt6_DIR: /Users/runner/work/SingleApplication/Qt/6.5.0/macos
    QT_PLUGIN_PATH: /Users/runner/work/SingleApplication/Qt/6.5.0/macos/plugins
    QML2_IMPORT_PATH: /Users/runner/work/SingleApplication/Qt/6.5.0/macos/qml
Info: creating stash file /Users/runner/work/SingleApplication/SingleApplication/examples/basic/.qmake.stash
Project ERROR: failed to parse default search paths from compiler output

I don't know how to debug this. With my latest commit, I've disabled the QMake build on MacOS. This should at least get the CI pipelines running again. (I hope the syntax is correct, I still have very little experience with Github Actions.)

[bebuch]

In my Repo the Pipelines succeeded.

https://github.com/bebuch/SingleApplication/actions/runs/12864628236/

It's ready for merge.