Comment by DrBurrito

this.

sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.backupd.plist

sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.backupd-auto.plist

sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.backupd-helper.plist