Cannot build on macOS Sequoia (M1)

[saschathiergart]

I am not able to build openEMS on MacOS 15.7.4. (Sequoia).

CMake Error at /opt/homebrew/lib/cmake/vtk-9.5/VTK-vtk-module-find-packages.cmake:1249 (find_package):
  By not providing "FindQt6.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "Qt6", but
  CMake did not find one.

  Could not find a package configuration file provided by "Qt6" (requested
  version 6.10) with any of the following names:

    Qt6.cps
    qt6.cps
    Qt6Config.cmake
    qt6-config.cmake

  Add the installation prefix of "Qt6" to CMAKE_PREFIX_PATH or set "Qt6_DIR"
  to a directory containing one of the above files.  If "Qt6" provides a
  separate development package or SDK, be sure it has been installed.
Call Stack (most recent call first):
  /opt/homebrew/lib/cmake/vtk-9.5/vtk-config.cmake:171 (include)
  CMakeLists.txt:110 (find_package)

I installed qt using brew

brew info qt           
==> qt ✔: stable 6.11.0 (bottled)
Cross-platform application and UI framework

Checklist

• [ x ] Full logs attached?
• [ x ] git master still has problem?
  build_20260412_232209.log

[thliebig]

Unfortunately I am really not an expert for macOS, but the last CI/CD build ran just fine. But as far as I can see from the logs qt 6.10.1 was used. I am not sure if you maybe can tell brew to install that instead?
Maybe you can have a look into the CI workflow to see if you can fix your dependencies?
I guess I have to try to rerun the CI/CD to see if something changed that broke that workflow...

[kinweilee]

I had similar issue but with Tahoe 26.4.1 on a fresh installation of brew, I uninstalled qt and then reinstalled it. Perhaps this will help with your issue.
brew uninstall qt
brew install qt
and then retry
./update_openEMS.sh $HOME/opt/openEMS --python

[saschathiergart]

I had similar issue but with Tahoe 26.4.1 on a fresh installation of brew, I uninstalled qt and then reinstalled it. Perhaps this will help with your issue. brew uninstall qt brew install qt and then retry ./update_openEMS.sh $HOME/opt/openEMS --python

Yeah i read your issue and i tried reinstalling qt, but i think the problem is that it install qt 6.11 instead of 6.10.1.

[kinweilee]

I checked my version of qt and it's 6.11.0, and vtk 9.5.2. I'm not sure what to suggest next except for a reinstall of qt and vtk.
I think this is the list of packages I installed on my new system.
brew install gcc cmake hdf5 cgal boost qt vtk
I've been using openEMS for a few years now on Macs so I'm quite confident you can get it to work.

[thliebig]

Well the latest CI run used qt 6.11 too. see log here

What you can do is build without AppCSXCAD using the "--disable-GUI" flag.
You could also have a look at out CI system how it builds it all to get some ideas? CI-mac