File access on macOS Catalina

[HIRAM (Richard E Barber)]

…Weird…

I can not reproduce. Use external and network drives heavily all day long with RT/Catalina/Big Sur. Did you try the last build I made… it’s in my keybase, https://kd6kxr.keybase.pub/RawTherapee_OSX_10.9_64_5.8-397-g276ae214f.zip