# 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)
When a new disk is connected, system prompts to ask if you want to use it as a backup volume.
defaults write com.apple.TimeMachine "DoNotOfferNewDisksForBackup" -bool "false"
# Set to true
When a new disk is connected, system does not prompt to ask if you want to use it as a backup volume.
defaults write com.apple.TimeMachine "DoNotOfferNewDisksForBackup" -bool "true"
# Read current value
defaults read com.apple.TimeMachine "DoNotOfferNewDisksForBackup"
# Reset to default value
defaults delete com.apple.TimeMachine "DoNotOfferNewDisksForBackup"