I do not know how to directly link the post of @MStraeten. Thus, I just cut and copy his last post 4 days ago (is it does not work just use the search function):
current master + a couple of RF lensfun data from: Kameratrollet
darktable-4.1.0+236~g78747838c_x86_64.dmg
latest commits: Pulse · darktable-org/darktable · GitHub
this build requires at least osx 10.15; don’t forget to backup …