Can't successfully enter the game again tonight, and WoW runs awfully on the fastest ever iMac.

My character Achathy on Khaz'goroth realm cannot successfully renter the
game after lag issues and me going to fullscreen mode and quitting the
game using File->Quit. The progress bar goes all the way along, but the
game world never appears.

Also I'm getting awful performance on a brand new top-of-the-line 24"
2.8GHz iMac. On highest detail settings frame rates drop to single
digits. Even with detail settings turned down I'm lucky to get 30 FPS.
To say this is disappointing is a gross understatement. This is an old
game and it won't run well on Apple's fastest ever all-in-one Mac? :-(
Looking at CPU usage stats I see WoW isn't anywhere near to using max
available resources :-( I'm incredibly disappointed :-(

TIA,
 Jamie Kahn Genet

-- 
If things get any worse, I'll have to ask you to stop helping me.