Aleš Erjavec

Can you run ```bash /Applications/Orange3.app/Contents/MacOS/Orange ``` directly and post any output.

Qt 5.15.2 that is included in the Orange3.app is build against macOS 10.13, and cannot run on your system Can you try running ``` /Applications/Orange3.app/Contents/MacOS/pip install PyQt5~=5.12.2 PyQtWebengine~=5.12.0 ``` This...

`processEvents` must not be called when the event loop is already running.

> Do I understand correctly that these signals are then processed in the other thread's event loop ... Assuming correct setup yes. > ... from which it is safe to...

Can you open up the Terminal.app application and run ``` ls -l ~/.config/biolab.si/ ``` command and paste the output.

Yes

Which version ubuntu, which version of Python, which version of pip? From the output you it appears you do not have numpy or cython installed which are required for building...

> Are this issue and #2898 still relevant? Yes

The problem is probably that 3rd-party catboost library that is included in the dmg is compiled for a newer CPU architecture. Can you try running ```bash /Applications/Orange3.app/Contents/MacOS/pip uninstall catboost ```...

There is no exception to catch. The process aborts with a SIGILL signal at import.