Apple Macs use a 680x0 family of processor and they usually do not come with a 3D graphics accelerator.
Macs haven't used 680x0 processors since 1994.
There a little bit like Commodore Amigas in that regards.
In that they haven't really existed since 1994? I guess so. Some Macs use a Power PC
Yes, the old ones. The ones you're apparently confusing with 680x0. The new ones use dual core Intel processors.
, but I wonder what that could do really with a BRL product?...
Well since BRL have been selling BlitzMax for both Intel and PPC Macs for a couple of years now, it can apparently do quite a lot.