macOS defaults

Appearance

Show extensions ​

Show all file extensions in the Finder.

  • Tested on macOS:
    • Sonoma
    • Ventura
    • Monterey
    • Big Sur
    • Catalina
    • Mojave
  • Parameter type: bool

Set to false (default value) ​

Do not show all file extensions inside the Finder

bash
defaults write NSGlobalDomain "AppleShowAllExtensions" -bool "false" && killall Finder

Set to true ​

Show all file extensions inside the Finder

bash
defaults write NSGlobalDomain "AppleShowAllExtensions" -bool "true" && killall Finder

Read current value ​

bash
defaults read NSGlobalDomain "AppleShowAllExtensions"

Reset to default value ​

bash
defaults delete NSGlobalDomain "AppleShowAllExtensions" && killall Finder