QuadToneRIP version 2.7.10 Release Notes The Mac OSX release is for macOS Catalina compatibility. For those on Mojave or before do NOT use this -- go back to version 2.7.9. Catalina is a major security release. Consider this QTR release a beta test release for Catalina. So far Catalina itself is a beta release so its hard to know for sure that this will work. If you are an early adopter of Catalina be aware that there are a number of updates that can interfere with other applications. The lack of 32-bit support is not the only issue. The "system" is now entirely read-only. The "data" (both system and data) is separate. It's actually at /System/Volumes/Data but with various virtual links much of this is hidden. Files have been moved but it seems like where it used to be. But be warned that you may find things strange at first. Installation still needs some Security workarounds. I'd do a clean install on a separate disk so you can go back if you like.