Thanks Beppe. Should I upgrade to Big Sur when it'll be released or I can stay on Catalina to use Octane X? There are some problems with eGPUs on Big Sur, hope Apple will fix them.

The PR3 is complete so the OTOY team knows all the details and compatibility possibilities. I can now ask about most crucial thing - will my Macs run Octane X?

I have two Macs:
- MBP 18 with Pro 555X - I assume that it is capable, coz it is a fairly new card.
- iMac late 2014 with R9 M290X - is ...