Mac client graphics jitters

[Hudsucker]

So I got p1999 to work on mac via the very helpful threads found on this forum, however I am experiencing crippling graphics jitters still.

Basically, the textures and models flip and freak out every few seconds, or if I'm moving all the time. I'm running on a macbook pro from 2007, is this a dual core issue?

Tried running Duxa's all in one installer but it corrupted my spells file and after fixing the spells file, just led to multiple crashes.

Any advice?