Sometime we need to make some tweaks en our OS. Most of the time this options are in “System preferences” via the UI, but other “hidden” options are available from the CLI (Terminal), like:
defaults write com.apple.screencapture type jpg killall Finder
this command change the default scheenshot format (PNG) to JPG
defaults write com.apple.screencapture disable-shadow -bool true killall SystemUIServer
to disable drop shadows on a screenshot
defaults write com.apple.finder CreateDesktop false killall Finder
this one hide all icons in the desktop. To revert this, change to “true”
defaults write com.apple.dock persistent-apps -array-add '{"tile-type"="spacer-tile";}'
killall Dock
add space to the icon’s docks
defaults write com.apple.finder AppleShowAllFiles true; killall Finder
show hidden files/folders (false to hide)