Mac OSX M.Lion Tekkit problem?

[AceSwordsman82]

So recently, Apple came out with an update for the Mountain Lion. So just as i finished playing Tekkit (at a fine 50-60 FPS) i updated like anyone would. After i installed the update, I decided to play some more. However, as i joined my favourite server, i would be able to move for, say, 1 second then it would freeze/lag incredibly. I tried playing on Singleplayer as well. Not much else happened. It would have the same habit of freezing/having an extreme lag spike. I tried reinstalling everything, changing my texture pack, EVERYTHING!!! Mind you, this only happens on Tekkit. Minecraft Vanilla works fine and FTB works too. I have no idea what the problem is. Can anyone help me? Thanks!

-Ace