Cannot take screenshots on Mac with Cmd+Shift+3

If I press the standard Mac screenshot key-combo, it takes a screenshot of nothing. Basically I get a black image.

 

How am I supposed to show off my character builds to my friends? Is there an actual screenshot key?

 

This kind of gets in the way of word-of-mouth marketing for Mac users.

 

(Also I can't Command+Tab out of the game, which isn't a massive issue because I can always window the game but it is slightly annoying.)

I think there's a screenshot hotkey noted in the game controls in-game menu ... is it different than what you're using?

 

Edit: nevermind, it's not there...I need those new reading glasses. Not familiar with the Mac - is there no print screen key? That's fairly common on "PC's".

OSX has a screenshot/slice keystroke combination, instead of a dedicated button.