Hi, Thanks for the reply.

That macpro is slower than my old pc for MoI (i7 quad core at 2.6ghz with 24gb ram and a gpu with 3gb of ram)

I will try the Displaythreadlimit

It's slow with edges, a bit less slower with edges off

The model is a complete building (no interior) with around 2200 windows (the file is around 800mb which is huge)

Is there any performance differences between moi on osx vs windows ?