1

Having used macOS/OS X for several years, I have come to realize that sometimes command line (_cli_) access for system preferences can be vital or life-saving when running into problems with macOS' system functionalities. Additionally, macOS also comes with a bunch of useful functionalities only accessible via command line (some of them require installation via `xcode-select --install`).

2

Sadly, many of these exist without having been updated for years and their documentations have been moved to Apple's [Document Archive](https://developer.apple.com/library/archive/navigation/) website. It is really disappointing that Apple seems to be no longer advocating command line operations for users of Macintosh.

4

Anyway, the following is an incomplete quick index of corresponding cli commands I have discovered for managing several macOS configurations/services. Most of these commands reside under `/usr/bin` or `/usr/local/bin`.