Test of RawTherapee on MacOS 10.14-15, 11, 12β Mojave-Catalina-Big Sur-Monterey (intel code)

[HIRAM (Richard E Barber)]

I had to fetch and merge the most recent features; spot removal is now there.
https://kd6kxr.keybase.pub/RawTherapee_OSX_10.12_64_5.8-3048-gc901f644a.zip