I think most of them work on both Snow Leopard and Lion. Not sure about previous versions. Just type the ones you want to activate/deactivate on the command line and have fun. # Enable full keyboard access for all controls (e.g. enable Tab in modal dialogs) defaults write NSGlobalDomain AppleKeyboardUIMode -int 3

# Enable the 2D Dock defaults write com.apple.dock no-glass -bool true

# Disable menu bar transparency defaults write -g AppleEnableMenuBarTransparency -bool false

# Expand save panel by default defaults write -g NSNavPanelExpandedStateForSaveMode -bool true

# Expand print panel by default defaults write -g PMPrintingExpandedStateForPrint -bool true

# Disable shadow in screenshots defaults write com.apple.screencapture disable-shadow -bool true

# Enable highlight hover effect for the grid view of a stack (Dock) defaults write com.apple.dock mouse-over-hilte-stack -bool true

# Enable spring loading for all Dock items defaults write enable-spring-load-actions-on-all-items -bool true

# Disable press-and-hold for keys in favor of key repeat defaults write -g ApplePressAndHoldEnabled -bool false

# Disable auto-correct defaults write NSGlobalDomain NSAutomaticSpellingCorrectionEnabled -bool false

# Disable window animations defaults write NSGlobalDomain NSAutomaticWindowAnimationsEnabled -bool false

# Disable disk image verification defaults write com.apple.frameworks.diskimages skip-verify -bool true defaults write com.apple.frameworks.diskimages skip-verify-locked -bool true defaults write com.apple.frameworks.diskimages skip-verify-remote -bool true

# Automatically open a new Finder window when a volume is mounted defaults write com.apple.frameworks.diskimages auto-open-ro-root -bool true defaults write com.apple.frameworks.diskimages auto-open-rw-root -bool true

# Avoid creating .DS_Store files on network volumes defaults write com.apple.desktopservices DSDontWriteNetworkStores -bool true

# Disable Safari's thumbnail cache for History and Top Sites defaults write com.apple.Safari DebugSnapshotsUpdatePolicy -int 2

# Enable Safari's debug menu defaults write com.apple.Safari IncludeDebugMenu -bool true

# Remove useless icons from Safari's bookmarks bar defaults write com.apple.Safari ProxiesInBookmarksBar "()"

# Disable send and reply animations in Mail.app defaults write com.apple.Mail DisableReplyAnimations -bool true defaults write com.apple.Mail DisableSendAnimations -bool true

# Disable Resume system-wide defaults write NSGlobalDomain NSQuitAlwaysKeepsWindows -bool false

# Enable Dashboard dev mode (allows keeping widgets on the desktop) defaults write com.apple.dashboard devmode -bool true

# Reset Launchpad rm ~/Library/Application\ Support/Dock/*.db

# Show the ~/Library folder chflags nohidden ~/Library

# Disable local Time Machine backups sudo tmutil disablelocal

# Kill affected applications for app in Safari Finder Dock Mail; do killall "$app"; done

# Fix for the ancient UTF-8 bug in QuickLook (http://mths.be/bbo) echo "0x08000100:0" > ~/.CFUserTextEncoding The original source can be found here.