Hello @KPK3D ,
Yes this one has taken a long time. Thanks for the patience. TLDR: it works now on MAC. I have been able to run and see it.
Substrate should now no longer crash on MAC with 5.5. We fixed compiler issues and a last bug yesterday and it runs on sm5 and sm6 level shading models (last crash fix related to MegaLight will be in the next 5.5 update I presume). There are some things that we need to iron out still: Substrate debug views in 5.5 do not show up on MAC (fixed for 5.6), etc. We are getting there 