congrates on the purchase of your new mac
i am a mac user also, i do not preech mac use but commend those who know the power
copying ps1 games on your mac is a little more complicated then on pc, and i would suggest findding access to a pc for simplicity's sake.
none the less, if you need to burn them on a mac, mega games has an intense trutorial on copying games, and buring bin files
http://www.megagames.com/psx/psx_cdr_cdcopy_toast.shtml
enjoy