I'm using it for both. I find it tolerable under OSX (precisely because of the Command key thing), though I don't like chording for things when there's a perfectly good one key option (like delete, home and end). And how do you Shift+Home/End for selecting? I forget, I know it's possible, but it's also a pain. I finally just punted and bought a Logitech Wave for it. I like it much better.