First off my OS is 10.7.4 and is a Late 2011 Macbook Pro with 2.4GHz i7, 16GB RAM and HD6770M 1024MB.
After starting up WoW 5.0.4, the CPU usage goes up to 100% at the login screen.
It uses a whole single core just to display the login screen.
Which makes the fans sound like a jet taking off.
[Similar Issue happened with Diablo 3 too, but was fixed]
The exact same thing happened during the Diablo 3 Beta too,
which was reported by multiple players and was fixed after a few patches for the retail version.
When I reported it on the D3 forums, blue post said D3 was a demanding game and uses a lot of resource, but in the end Blizzard fixed it, previously hogging 100% at the login screen going down to 30% even during game play.
I know the drill. SMC reset, repair permission etc. I went through that with Diablo 3 too.
But ended up being a bug or something in the client.(thats why its fixed now)
So please look in to this, because it makes me not want to play, cause I do not want to break my laptop which wasn't cheap.
Thank you for your time.