@Antbanks51 That's the expected behavior. Nudge does its thing until the Mac is updated because you can't really trust that a user who clicks Update will actually do the same when they reach the Software Update screen.

I used Nudge to run a self-service Erase-Install script instead of the built-in MacOS update menu, and I had the same issue: people would click update, and while the update was downloading, they would be nudged again. It was annoying.

So what I did was unload the nudge launch agent within the script and then have the launch agent be restarted at the end of the script

#!/bin/sh
# Unload Nudge Launch Agent and Begin MacOS upgrade script
# Written by Mick Grant - mgrant1@arm.catholic.edu.au

# find active user code supplied by Armin Briegel - Scripting OS X
# sample code for this blog post
# https://scriptingosx.com/2020/08/running-a-command-as-another-user/

# variable and function declarations

export PATH=/usr/bin:/bin:/usr/sbin:/sbin

# get the currently logged in user
currentUser=$( echo "show State:/Users/ConsoleUser" | scutil | awk '/Name { print $3 }' )

# global check if there is a user logged in
if [ -z "$currentUser" -o "$currentUser" = "loginwindow" ]; then
echo "no user logged in, cannot proceed"
exit 1
fi
# now we know a user is logged in

# get the current user's UID
uid=$(id -u "$currentUser")

# convenience function to run a command as the current user
# usage:
# runAsUser command arguments...
runAsUser() {
if [ "$currentUser" != "loginwindow" ]; then
launchctl asuser "$uid" sudo -u "$currentUser" "$@"
else
echo "no user logged in"
# uncomment the exit command
# to make the function exit with an error when no user is logged in
# exit 1
fi
}

# main code starts here

#kill the running nudge process
killall Nudge
echo "killing the running nudge window"

# unload the com.github.macadmins.nudge launch agent
runAsUser launchctl unload /Library/LaunchAgents/com.github.macadmins.Nudge.plist
echo "Nudge launch agent has been unloaded"

#launch erase-install
echo "Erase-install script active, installing macOS - "$4"."
/Library/Management/erase-install/erase-install.sh --reinstall --current-user --check-power --version=$4 --cleanup-after-use --rebootdelay 300 --no-timeout --overwrite

# reload the com.github.macadmins.nudge launch agent if Erase-install script fails, so that nudge will keep activating
runAsUser launchctl load /Library/LaunchAgents/com.github.macadmins.Nudge.plist
echo "Nudge launch agent has been loaded. Your not getting away from me that easily"