tmstop.sh

#!/bin/zsh -ef

# Stop Time Machine & AppleFileServer

export PATH=/bin:/usr/bin:/usr/sbin:/usr/libexec
setopt extendedglob

diskutil mount $(diskutil list | awk '/MaryBackup\+ A/ { print $NF }')

[[ $(id -u) == 0 ]] || { print "$0: must be running as root" >&2 ; exit 1 }

# disable AppleFileServer
if launchctl list com.apple.AppleFileServer >& /dev/null ; then
    launchctl unload /System/Library/LaunchDaemons/com.apple.AppleFileServer.plist
fi

# disable backupd
defaults write /Library/Preferences/com.apple.TimeMachine AutoBackup -bool NO

# wait for backupd to stop
while launchctl list com.apple.backupd | grep -q 'com.apple.backupd-status'; do
    sleep 1
done