I'm using a mac keyboard and the command+F13 shortcut doesn't seem to be working. I don't have a screenshots folder in /media/fat, and I'm assuming it would be created the first time I create a screenshot. Other function keys do work (F9, F12).
I'd prefer not to use the keyboard for this and a controller instead, but my googling indicates that isn't possible.
If you have any ideas I'd appreciate it!