Debloat iMac

cath.sh

# Disable Spotlight indexing completely (most aggressive)
sudo mdutil -a -i off

# Or just disable for specific volumes (less aggressive)
sudo mdutil -i off /

# Disable Time Machine local snapshots
sudo tmutil disablelocal

# Disable Photos analysis
defaults write com.apple.Photos CPLDontStartCPLAfterFreshInstall -bool true

# Disable Siri
defaults write com.apple.assistant.support "Assistant Enabled" -bool false

# Disable Game Center
defaults write com.apple.gamed Disabled -bool true

# Disable automatic termination of inactive apps
defaults write NSGlobalDomain NSDisableAutomaticTermination -bool true

# Disable App Nap system-wide
defaults write NSGlobalDomain NSAppSleepDisabled -bool true

# Disable smart quotes and dashes
defaults write NSGlobalDomain NSAutomaticQuoteSubstitutionEnabled -bool false
defaults write NSGlobalDomain NSAutomaticDashSubstitutionEnabled -bool false

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


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# Disable unnecessary Apple services
sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.metadata.mds.plist 2>/dev/null
sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.apsd.plist 2>/dev/null
sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.suggestionsd.plist 2>/dev/null

# Disable Knowledge Base daemon
launchctl unload -w /System/Library/LaunchAgents/com.apple.knowledgeagent.plist 2>/dev/null

# Disable Notification Center
launchctl unload -w /System/Library/LaunchAgents/com.apple.notificationcenterui.plist 2>/dev/null


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# Disable Bonjour multicast
sudo defaults write /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist ProgramArguments -array-add "-NoMulticastAdvertisements"

# Disable AirDrop
defaults write com.apple.NetworkBrowser DisableAirDrop -bool true

# Disable wake for network access
sudo pmset -a womp 0

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# Reduce transparency
defaults write com.apple.universalaccess reduceTransparency -bool true

# Disable animations
defaults write NSGlobalDomain NSAutomaticWindowAnimationsEnabled -bool false
defaults write com.apple.finder DisableAllAnimations -bool true
defaults write com.apple.dock expose-animation-duration -float 0.1
defaults write com.apple.dock autohide-time-modifier -float 0

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# Reduce transparency
defaults write com.apple.universalaccess reduceTransparency -bool true

# Disable animations
defaults write NSGlobalDomain NSAutomaticWindowAnimationsEnabled -bool false
defaults write com.apple.finder DisableAllAnimations -bool true
defaults write com.apple.dock expose-animation-duration -float 0.1
defaults write com.apple.dock autohide-time-modifier -float 0