I'm really not too Mac savvy (apart from what I've already said), but I think you may be SOL until PS comes out with a Mac version.
What level are you playing at? If $25NL or less, stick with
FTP as rakeback will work. PS doesn't have any rakeback deals available.
$50NL-$200NL is the Cardrunners shooting gallery, so you may want to stay away from those levels on FT.