I'm not sure about the details, but I'm running Mac OS X 10.5 with the latest 0.06 build of Cog and the remote seems to work fine. Just wanted to add another data point. 
1 2007-11-21 00:07:54
Re: Apple Remote not working under Leopard (11 replies, posted in Squashed Bugs)
2 2007-11-14 07:12:25
Re: *Cog Users, Sign Here* (91 replies, posted in General)
Hi, I'm a new Cog user as well longing for a media player like winamp of old. Currently, I only use the beta version of Cog to play VG music (only SPC files right now) - this is the only decent media player I could find which works on Leopard and plays the SPC format correctly. If it starts supporting PSF/PSF2, I will become a committed follower for sure!