Hi, some time ago I had CDLC working on RS in my MAC. Now I have updated to MacOS Catalina, I reinstalled Steam and RS on the default location (I am smart enough to install it somewhere else and also to stay away from windows :-) ), and run the pach according to the instructions. The terminal aid something like "Last login: Thu Mar 26 19:53:05 on ttys000 The default interactive shell is now zsh. To update your account to use zsh, please run `chsh -s /bin/zsh`. For more details, please visit https://support.apple.com/kb/HT208050. Ludo-MBP:~ ludo$ /Users/ludo/Downloads/MAC_Patch-4/RUN_PATCH