# Don't offer new disks for Time Machine backup
Prevent Time Machine from prompting to use newly connected storage as backup volumes.
- Tested on macOS:
- Catalina
- Parameter type: bool
# Set to false
(default value)
defaults write com.apple.TimeMachine DoNotOfferNewDisksForBackup -bool false
- When a new disk is connected, system prompts to ask if you want to use it as a backup volume.
# Set to true
defaults write com.apple.TimeMachine DoNotOfferNewDisksForBackup -bool true
- When a new disk is connected, system does not prompt to ask if you want to use it as a backup volume.
# Read current value
defaults read com.apple.TimeMachine DoNotOfferNewDisksForBackup
# Delete current value
defaults delete com.apple.TimeMachine DoNotOfferNewDisksForBackup