Dan Frakes:
With Messages beta, my colleagues don’t see me as being online. Fewer work interruptions, I suppose.
I had the same problem. I could see my AIM buddies, but none of my AIM buddies could see me. (Listeners of The Talk Show live broadcast last week could hear me discover this problem.) I think the problem only affects AIM users with a @mac.com AIM ID. When you upgrade from iChat to Messages, Messages assumes you want to use @me.com as your AIM ID. Apple itself treats example@me.com and example@mac.com as synonymous, but AIM does not. So what Messages is doing is logging you in as example@me.com, but you need to be logged in as example@mac.com for your buddies to see you.
Solution: Delete your AIM account in Messages’s preferences, then recreate it. In addition to restoring your visibility to your buddies, it also restores your ability to transfer files.
★ Tuesday, 21 February 2012