Avoid using the homebrew qt6 which doesn't work with macdeployqt

.github/workflows/build.yml

@@ -47,9 +47,17 @@ jobs:
         rm /usr/local/bin/idle3*
         rm /usr/local/bin/pydoc3*
         rm /usr/local/bin/python3*
-        brew install --overwrite boost cmake doctest minizip ninja nlohmann-json pugixml qt6 pugixml rtmidi
+        brew install --overwrite boost cmake doctest minizip ninja nlohmann-json pugixml pugixml rtmidi
+
+    # Note: we avoid using the homebrew Qt since it breaks macdeployqt (https://github.com/Homebrew/brew/issues/15354)
+    - name: Install Qt
+      uses: jurplel/install-qt-action@v4
+      with:
+        arch: clang_64
+        version: 6.7.2
+
     - name: Generate Project
-      run: cmake -S ${GITHUB_WORKSPACE} -B ${{runner.workspace}}/build -G Ninja -DCMAKE_BUILD_TYPE=Release -DCMAKE_PREFIX_PATH=/usr/local/opt/qt6/lib/cmake
+      run: cmake -S ${GITHUB_WORKSPACE} -B ${{runner.workspace}}/build -G Ninja -DCMAKE_BUILD_TYPE=Release
     - name: Build
       run: cmake --build ${{runner.workspace}}/build
     - name: Test

README.md

@@ -131,6 +131,7 @@ You'll have to update the variables for your specific paths to `$vcpkg_exe_path`
 * Install Xcode along with its Command Line Tools.
 * Install dependencies:
   * `brew install boost cmake doctest minizip ninja nlohmann-json pugixml qt6 pugixml rtmidi`
+  * Note that the Qt package from homebrew [does not currently work for building the installer|https://github.com/Homebrew/brew/issues/15354]. Installing via https://github.com/miurahr/aqtinstall is an alternative.
 * Build:
   * `mkdir build && cd build`
   * `cmake -G Ninja -DCMAKE_BUILD_TYPE=Debug -DCMAKE_PREFIX_PATH=/usr/local/opt/qt6/lib/cmake ..`