Be careful, the reason this wasn't enabled is that it screws with the kernel. It should be enabled on the first update of 10.1. Also if you use OpenGL programs in classic like Strata3D, don't expect them to work for more than a minute or so before quitting. It seems to have a negative effect on OpenGL. Strata crashed constantly once I enabled this (via terminal, not with this thing), when I disabled it Strata has been running two days straight without a crash.