I would assume so...I mean as long as the hardware is working...If you aren't watching (Or playing) on the mac and are using the TV...But I'm not sure. As I do not have a 3D TV.
Ive got an Imac (2006) and i hooked it up to my 3dtv and as long as i downloaded a movie with SBS (side by side) the only thing i have to do is set my tv to SBS-mode.
But due to the lack of sufficient hardware in my iMac the movie isnt watchable from time to time but it still works. I use XBMC, nothing else needed as far as i know