OS X defaults.

osx.sh

# Show remaining battery time; hide percentage
# defaults write com.apple.menuextra.battery ShowPercent -string "NO"
# defaults write com.apple.menuextra.battery ShowTime -string "YES"

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

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

# Disable opening and closing window animations
# defaults write NSGlobalDomain NSAutomaticWindowAnimationsEnabled -bool false

# Increase window resize speed for Cocoa applications
# defaults write NSGlobalDomain NSWindowResizeTime -float 0.001

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

# Enable full keyboard access for all controls (e.g. enable Tab in modal dialogs)
# defaults write NSGlobalDomain AppleKeyboardUIMode -int 3

# Enable subpixel font rendering on non-Apple LCDs
defaults write NSGlobalDomain AppleFontSmoothing -int 2

# Enable tap to click (Trackpad) for this user and for the login screen
# defaults write com.apple.driver.AppleBluetoothMultitouch.trackpad Clicking -bool true
# defaults -currentHost write NSGlobalDomain com.apple.mouse.tapBehavior -int 1
# defaults write NSGlobalDomain com.apple.mouse.tapBehavior -int 1

# Require password immediately after sleep or screen saver begins
defaults write com.apple.screensaver askForPassword -int 1
defaults write com.apple.screensaver askForPasswordDelay -int 0

# Show all filename extensions in Finder
defaults write NSGlobalDomain AppleShowAllExtensions -bool true

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

# Empty Trash securely by default
defaults write com.apple.finder EmptyTrashSecurely -bool true

# Enable AirDrop over Ethernet and on unsupported Macs running Lion
# defaults write com.apple.NetworkBrowser BrowseAllInterfaces -bool true

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

# Automatically hide and show the Dock
defaults write com.apple.dock autohide -bool true

# Force the Dock to only show running applications
defaults write com.apple.dock static-only -bool TRUE

# Only use UTF-8 in Terminal.app
defaults write com.apple.terminal StringEncodings -array 4

# Disable the Ping sidebar in iTunes
# defaults write com.apple.iTunes disablePingSidebar -bool true

# Disable all the other Ping stuff in iTunes
# defaults write com.apple.iTunes disablePing -bool true

# Make ⌘ + F focus the search input in iTunes
# defaults write com.apple.iTunes NSUserKeyEquivalents -dict-add "Target Search Field" "@F"

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

# Reset Launchpad
# [ -e ~/Library/Application\ Support/Dock/*.db ] && rm ~/Library/Application\ Support/Dock/*.db

# Prevent Time Machine from prompting to use new hard drives as backup volume
defaults write com.apple.TimeMachine DoNotOfferNewDisksForBackup -bool true

# Disable local Time Machine backups
hash tmutil &> /dev/null && sudo tmutil disablelocal

# Kill affected applications
for app in Finder Dock Mail Safari iTunes iCal Address\ Book SystemUIServer; do killall "$app" > /dev/null 2>&1; done
echo "Done. Note that some of these changes require a logout/restart to take effect."

# http://mariusvw.com/2011/06/16/how-to-fix-the-crackling-bad-sound-of-bluetooth-a2dp-headsets-or-speakers-on-mac-os-x/
defaults write com.apple.BluetoothAudioAgent "Apple Bitpool Max (editable)" 80
defaults write com.apple.BluetoothAudioAgent "Apple Bitpool Min (editable)" 48
defaults write com.apple.BluetoothAudioAgent "Apple Initial Bitpool (editable)" 40
defaults write com.apple.BluetoothAudioAgent "Negotiated Bitpool" 48
defaults write com.apple.BluetoothAudioAgent "Negotiated Bitpool Max" 53
defaults write com.apple.BluetoothAudioAgent "Negotiated Bitpool Min" 48
defaults write com.apple.BluetoothAudioAgent "Stream - Flush Ring on Packet Drop (editable)" 30
defaults write com.apple.BluetoothAudioAgent "Stream - Max Outstanding Packets (editable)" 15
defaults write com.apple.BluetoothAudioAgent "Stream Resume Delay" "0.75"