Update to 6.19.19... Rendered view behaves substantially different

[dan]

I suspect this is the same issue reported over in:

Update to v6.19 now dark grey rendered view and shaded view

I’ve just updated to rhino 6.19 and now my shaded and rendered views are now a weird dark grey/black colour? i’ve tried different files and new files but still having the same problem - is this an intentional change to rhino or is this a bug? anyone else having this issue? [00] [26]

(which we can reproduce)

We are looking into this now.

In the meantime, here is a link to the Rhino 6 for Mac 6.18 build:
http://files.mcneel.com/rhino/6/mac/releases/rhino_6.18.19266.13352.dmg