1. I hadn't seen that guide, but there is some issue where Catalina thinks that the command line tools installed are up to date, but `brew doctor` reports othe

1. I hadn't seen that guide, but there is some issue where Catalina thinks that the command line tools installed are up to date, but `brew doctor` reports otherwise and you are forced to manually download the command line tools, just like in that guide. 2. I tried zsh briefly, then just used the bash that you can install via homebrew.