MAC(Intel) OSX and Einstein@Home

Nothing. The 5.2.x Client doesn't know about Mac Intel platform yet, so it runs the MacOS PPC App (and the benchmark, too) in PPC emulation, that's why it is so slow. It's also true that the emulated App crashes when trying to run OpenGL graphics, though I don't precisely know why. The 5.3.x client reports the correct platform and thus downloads a "native" App.

BM