I have a MacBook AIR without IR and an Apple remote control (bought without knowing my laptop didn't have IR). I am looking for an IR adaptor. Can you please recommend me one that works on Mac?
Have a look at Mira and Remote Buddy, which are programs to enable the Apple Remote on systems that don't have it built-in (they also provide expanded functionality I believe). They both have hardware compatibility lists that should provide you with some good suggestions (here for Mira, and here for Remote Buddy.