Known issues


Due to security updates in OSX release 10.15 (macOS Catalina), the Gatekeeper may flag *.mex* files in qMRLab as unsafe and quarantine them. In this case, you won’t be able to start qMRLab and the following error will appear:


filename.mexmaci64 cannot be opened because the developer cannot be verified. macOS cannot verify that this app is free from malware.

To lift the quarantine and to add Gatekeeper exceptions for the qMRLab’s mex files, start a terminal and run the following:

sudo xattr -r -d /full/path/to/qMRLab
sudo find /full/path/to/qMRLab -name \*.mexmaci64 -exec spctl --add {} \;

Please open a new issue if this solution did not work for you.

Apple Silicon (M1) compatibility

    • According to the official Mathworks announcement, MATLAB is fully compatible with M1 CPU from R2020b onward. On the other hand, we successfully run qMRLab in R2018b (MacBook Pro, 13”, Early 2020, M1).
  • Octave