Show, change, toggle the menu bar visibility on macOS Big Sur

menubar-visibility.sh

#!/usr/bin/env zsh -f
# Purpose: Toggle, or check, the menu bar visibility. Tested on macOS 11.
#
# From:	Timothy J. Luoma
# Mail:	luomat at gmail dot com
# Date:	2021-05-04

NAME="$0:t:r"
SCRIPT_NAME="$0"

if [[ -e "$HOME/.path" ]]
then
	source "$HOME/.path"
fi

OS_VER=$(sw_vers -productVersion | cut -d '.' -f 1)

if [[ "$OS_VER" -lt "11" ]]
then
	echo "$0 requires macOS 11 (Big Sur) or later." >>/dev/stderr
	exit 1
fi

function autohide-off {

# Don't Indent - BEGIN
/usr/bin/osascript <<EOT
tell application "System Events"
	tell dock preferences to set autohide menu bar to false
end tell
EOT
# Don't Indent - END

}

function autohide-on {

# Don't Indent - BEGIN
/usr/bin/osascript <<EOT
tell application "System Events"
	tell dock preferences to set autohide menu bar to true
end tell
EOT
# Don't Indent - END

}

function get-status {

	CURRENT=$(defaults read NSGlobalDomain _HIHideMenuBar 2>/dev/null)

		######################
		#	0 = not hidden
		#	1 = hidden
		#
		# Also, if there is no value set, it has probably never been hidden,
		# so we assume it is not hidden
	if [[ "$CURRENT" = "1" ]]
	then
		HIDDEN='yes'
		VERBOSE='Menu Bar is currently hidden.'
		QUIET='1'
	else
		HIDDEN='no'
		VERBOSE='Menu Bar is currently visible.'
		QUIET='0'
	fi

}

function show-status {

	get-status
	echo "$NAME: $VERBOSE"

}

function show_usage {

cat <<EOINPUT
'$SCRIPT_NAME' can do two things:

1. Show the current hidden/unhidden status of the menu bar on the Mac.

2. Change that status.

The following options control what '$0' does:

	(none)			show current status
	-h --hide		hide the menu bar
	-u --unhide		make the menu bar visible
	-t --toggle		if hidden, unhide. If visible, hide
	-q --quiet		no output, only exit code: 0 for Not Hidden, 1 for Hidden
	-s --status		show current status
	-H --help		show this text

EOINPUT

}


if [[ "$#" == "0" ]]
then
	show-status
	echo "$NAME: use '--help' for usage info."
	exit 0
fi

for ARGS in "$@"
do
	case "$ARGS" in
		-q|--quiet)
				# no output, only exit 0 or 1
				get-status
				exit $QUIET
		;;

		-t|--toggle)

				get-status

				if [[ "$HIDDEN" == "yes" ]]
				then
					autohide-off
					show-status
				else
					autohide-on
					show-status
				fi

				shift
		;;

		-h|--hide)

				autohide-on
				show-status
				shift
		;;

		-s|--status)

				show-status
				shift
		;;

		-H|--help)
				show_usage
				exit 0

		;;

		-u|--unhide)

				autohide-off
				show-status
				shift
		;;

		-*|--*)
				echo "	$NAME [Error]: Don't know what to do with arg: $1"
				show_usage
				shift
		;;

	esac

done # for args

exit 0
#EOF

Thanks to this thread on the Keyboard Maestro forums for bringing this to my attention.