Hi Michael,

It is the Nov 13 version.
No Anti-Virus running.
I opened it directly from the unzipped file without putting it in the Applications folder.

Still having the infinite calculation on most operations.

I can't repeat the artefact problem for the moment.
Maybe caused by a certain sequence of operations that I didn't note...

It works fine on Parallel's (I didn't perform any speed tests as my projets are usually not to big).

It also works fine on a non Retina iMac under OSX 10.12.6.


Michel