My Problem: When I want to add a superscript the shortcut is "Ctrl+6", it doesn't work, if I use the Writing Assistant tool the superscript appears with no errors. It also happen with any combination, like "Ctrl+2", for square root. Other kind of combinations, for example, "Ctrl+Shift+7" gives a fraction, with no problems, also "Ctrl+_" works for subscripts
What I have done: Reseting Mathematica preferences by pressing "Option+Shift" and opening the program waiting for full start, did not work. Removing "/Library/Mathematica/" and "Library/Mathematica/" folders, I don't know if there are more pref. folders in the system, after this I had to reenter activation keys, like a new installation but it did not worked.