Script to manually set a Mac's hostname

manual-rename-comp.bash

#!/bin/bash

currentCompName=$(/bin/hostname)

getCompName() {

newCompName=$(/usr/bin/osascript <<AppleScript
display dialog "Current computer name: ${currentCompName}
Please enter the new computer name below.
Example: YOUR_EXAMPLE_HOSTNAME_HERE" with title "Set New Computer Name" default answer ""
set enteredCompName to text returned of result
AppleScript
/bin/echo "${newCompName}"
)
}

verifyCompName() {

reviewNewName=$(/usr/bin/osascript <<AppleScript
display dialog "Change computer name from ${currentCompName} to ${newCompName}?" with title "Verify New Computer Name" buttons {"Cancel", "Yes"} default button 1
set response to button returned of result
AppleScript
/bin/echo "${reviewNewName}"
)
}

successNewName() {

confirmation=$(/usr/bin/osascript <<AppleScript
display dialog "Successfully changed computer name to ${newCompName}!" with title "SUCCESS" buttons {"OK"} default button 1
AppleScript
)
}

failedNewName() {

confirmation=$(/usr/bin/osascript <<AppleScript
display dialog "Failed to change computer name to ${newCompName}!" with title "FAILED" buttons {"OK"} default button 1
AppleScript
)
}

##########################
######### SCRIPT #########
##########################

getCompName

if [ "${newCompName}" = "" ]; then
	/bin/echo "Rename Cancelled"
	exit 0
fi

verifyCompName

if [ "${newCompName}" != "" ] && [ "${reviewNewName}" != "" ]; then
	/usr/sbin/scutil --set ComputerName "${newCompName}"
	/usr/sbin/scutil --set HostName "${newCompName}"
	/usr/sbin/scutil --set LocalHostName "${newCompName}"
	
	newComputerName=$(/usr/sbin/scutil --get ComputerName)
	newHostName=$(/usr/sbin/scutil --get HostName)
	newLocalHostName=$(/usr/sbin/scutil --get LocalHostName)
else
	/bin/echo "Rename Verify Cancelled"
	exit 0
fi

if [ "${newComputerName}" = "${newCompName}" ] && [ "${newHostName}" = "${newCompName}" ] && [ "${newLocalHostName}" = "${newCompName}" ]; then
	/bin/echo "Rename Successful!"
	successNewName
else
	/bin/echo "Rename Failed."
	failedNewName
	exit 1
fi

exit