Hi,
I just thought that you're our old good friend! Your nickname
We're working on Mac 64-bit version of PTE. We hope to build Alpha version this autumn. Currently we're testing different parts of PTE on Mac (interface, video player, audio).
How you think, is it safe to use deprecated CoreServices APIs:
MPCreateSemaphore, MPDeleteSemaphore, MPCreateCriticalRegion, MPDeleteCriticalRegion, MPEnterCriticalRegion, MPExitCriticalRegion, MPCreateEvent
P.S. Last official version PTE 9 for Windows contains many improvements - new powerful editor of animations, slide styles, color effects, etc.