关闭mac系统更新提示小红点

defaults write com.apple.systempreferences AttentionPrefBundleIDs 0
sudo defaults write /Library/Preferences/com.apple.SoftwareUpdate.plist LastUpdatesAvailable 0
sudo defaults write /Library/Preferences/com.apple.SoftwareUpdate.plist LastRecommendedUpdatesAvailable 0
sudo defaults delete /Library/Preferences/com.apple.SoftwareUpdate.plist RecommendedUpdates
killall Dock