I can confirm, this version of Mame OS X 0.135 Killer Instinct 1 (1.5d)& 2(1.4) is too slow to play.
I too can not get the cheat.zip (already unzipped the first .zip and left the cheat.zip file) and still Mame OS X doesn't read or allow cheat option even though its enabled in the preferences. Dave can these two things be fixed? Thanks