> "Disable System Identity Protection."

This is the first thing I do on any Mac OS system before I start using it.

Could you elaborate why? I’m new to macOS, I’d love to learn more about it.

SIP is a feature that protects you from malicious actors with root (admin) access on your device. After they've encrypted your photos and drives and changed your passwords, it prevents them from making your machine unbootable by deleting or altering system binaries. As a side effect of this protection, you give up certain freedoms to customize your system.

https://github.com/koekeishiya/yabai

For instance requires SIP to be disabled.