The shortcut for commenting (whole blocks of) code in MetaEditor is "Ctrl + ' " (both on PC and Mac).
However, the PC-shortcut for uncommenting is "Ctrl + ;" while the same doesn't work on Mac.
Does anybody know the shortcut for uncommenting (blocks of) code on Mac?
I just found the solution myself: at least on the Austrian/German keyboard layout it's "Ctrl + ö"