~/.osx →
Mathias Bynens’ aforementioned collection of OS X tweaks, updated for Mountain Lion.
My favourites:
# Expand save panel by default defaults write NSGlobalDomain NSNavPanelExpandedStateForSaveMode -bool true # Enable full keyboard access for all controls # (e.g. enable Tab in modal dialogs) defaults write NSGlobalDomain AppleKeyboardUIMode -int 3 # Disable auto-correct defaults write NSGlobalDomain NSAutomaticSpellingCorrectionEnabled -bool false # Disable the warning when changing a file extension defaults write com.apple.finder FXEnableExtensionChangeWarning -bool false # Show the ~/Library folder chflags nohidden ~/Library # Don’t show Dashboard as a Space defaults write com.apple.dock "dashboard-in-overlay" -bool true # Finder: allow text selection in Quick Look defaults write com.apple.finder QLEnableTextSelection -bool true(That last one is especially handy if you install QLStephen, which lets you view text files with Quick Look.)