Advertisements Comskip.exe is a 32-bit app and it looks like macOS 10.15 Catalina can only run 64-bit apps. It would be up to the developer of comskip to provide a 64-bit version. You will probably run into the same problem with the other utilities that kmttg uses like AtomicParseley. ccextractor, etc. See How to Run 32-Bit Apps in macOS Catalina for more.