But the main.mfc is not that critical, IPACS itself has written something about it in the Wiki: https://www.aerofly.com/dokuwiki/doku.php/simulator:mcf
You can't really break anything in main.mfc, because in case of an emergency you simply delete it and restart the FS. This will automatically reboot main.mfc - now just use the default settings.
In addition, the basic rule always applies: always create a backup copy before every change.
The only drawback I see as a Mac user is that I can't use the add-ons in EXE - but I don't think that's so bad. Everything else is comparable for Mac and Windows from my point of view and fits.
Tschüss, Michael (III)