Here’s some terminal commands I use to alter my Mac’s appearance / operation.

Note: These are all terminal commands, don’t use them unless you know what you’re doing.

Make hidden apps dock icon transparent:

defaults write com.apple.Dock showhidden -bool YES killall Dock

Add “Quit Finder” option to Finder menu:

defaults write com.apple.finder QuitMenuItem -bool YES killall Finder

Set your screensaver as your wallpaper:

/System/Library/Frameworks/ScreenSaver.framework/Resources/ScreenSaverEngine.app/Contents/MacOS/ScreenSaverEngine -background

Restarting Finder (needed after most of these to activate):

killall Dock