Virtual Mode means running an operating system on a virtual machine, such as DOSBOX.

EClark184 - OpenGL and Open CL haven't been updated for years on OSX. The current version on OSX is 3 or 4 versions back from what is current. Currently, Metal is lacking a lot of functionality that is in OpenGL. (Think the 1st 5 years or so of the Cocoa libraries - P.T. Barnum was demanding that developers move to it, and didn't want to hear that most of the functionality of the Carbon libraries simply didn't exist in Cocoa.)

As someone that has been on OSX since the 10.0 beta, I'd recommend preparing to transition off OSX. Tim Cook is John Sculley redux. There won't be any creative professionals left to rescue Apple like last time.

The upcoming 7,1 Mac Pro wasn't writing on the wall, it was a comet streaking across the sky (and a big %$ to everyone that is still on a 4,1 or 5,1 awaiting something other than a dongle for Logic and Final Cut).