V4 beta Nov-18-2017 available now

 From:  Marc (TELLIER)
8682.81 
Hi Michael,

Congratulations on this tremendous achievement!
I imagine you must have been discouraged at many point at the insane amount of work required.

I had no time to test it more than kicking the tires, I'm in a bit of a work rush, but I'll get to more serious modelling soon.
On thing I noticed is the 'live' aspect of extrude seems slower in the Mac version than Windows.

Marc