There has been some discussion of it
here.
In general the word is not to run AC9 on an Intel Mac (unless you want to load XP). It is not ported to the Intel platform (but AC10 will be) so it runs in emulation with Rosetta. GS does not support this and the performance will be slow, but apparently it does work.
I am planning to get a 17" MacBook once they become available, so I may be running 9 in XP for a while.
