As others have mentioned, Little Snitch + Block Block is a powerful combination that lets you (1) see what is phoning home, and (2) know what crap apps are inst

As others have mentioned, Little Snitch + Block Block is a powerful combination that lets you (1) see what is phoning home, and (2) know what crap apps are installing in the background. I like to set up a lock screen message with your name/phone. https://support.apple.com/en-us/HT203580 https://support.apple.com/en-us/HT203580. Not "security" per say, but can help get your computer back to you if stolen. Set a firmware password to prevent your mac from being reformatted: https://support.apple.com/en-us/HT204455 https://support.apple.com/en-us/HT204455 If you're using Filevault, you may want to ensure you are not backing up your recovery key to iCloud. There's a terminal command (I think) to discover if it is. You should also go in and show hidden files. In terminal: "defaults write com.apple.Finder AppleShowAllFiles true"