# Show extensions

Show all file extensions in the Finder.

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

# Set to false (default value)

Do not show all file extensions inside the Finder

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

# Set to true

Show all file extensions inside the Finder

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

# Read current value

defaults read NSGlobalDomain "AppleShowAllExtensions"

# Reset to default value

defaults delete NSGlobalDomain "AppleShowAllExtensions" && killall Finder