[nsx_23]

I'm not too sure about mp3gain for mac, but here's the link to their website http://mp3gain.sourceforge.net/

They also have an AAC gain extension so that mp3gain will also handel AACs.

 

[nsx_23]

Here's the link for mp3gain for macs:

http://homepage.mac.com/beryrinaldo/...on/MacMP3Gain/

But I'm still not sure about an AAC plugin for mac atm.....