A RawTherapee 5.7 build for macOS is now available for download.
Caveat: In the latest macOS 10.15 Catalina Developer Beta 8, file access is restricted to ~ and ~/Pictures.
sha256sum:
70f7b7fec75f2799d80b2f960cf98815d5a5b199342d993a6019eeb153332c3d RawTherapee_OSX_10.9_64_5.7.zip