https://macmule.com/2013/12/20/beachball-when-coming-out-of-sleep-or-when-deactivating-the-screen-saver/

DeleteLoginwindowPlistShowInputMenuKey.sh

#!/bin/sh
####################################################################################################
#
# License: https://macmule.com/license/
#
####################################################################################################

###
# Returns a list of all folders found under /Users
###
for userFolders in `ls -d -1 /Users/* | cut -c 8- | sed -e 's/ /\\ /g' | grep -v "Shared"`
do
	# Check for the showInputMenu key in /Users/"$userFolders"/Library/Preferences/com.apple.loginwindow.plist...
	if ! ( sudo defaults read /Users/"$userFolders"/Library/Preferences/com.apple.loginwindow showInputMenu &> /dev/null );
  then
		# If  showInputMenu key in /Users/"$userFolders"/Library/Preferences/com.apple.loginwindow.plist does not exist then...
		echo "showInputMenu key not set in /Users/"$userFolders"/Library/Preferences/com.apple.loginwindow.plist..."
		echo ""
	else
		# If showInputMenu key in /Users/"$userFolders"/Library/Preferences/com.apple.loginwindow.plist exists...
		# Delete the showInputMenu key from the loginwindow plist
		sudo defaults delete /Users/"$userFolders"/Library/Preferences/com.apple.loginwindow showInputMenu
		echo "Deleted showInputMenu key from /Users/"$userFolders"/Library/Preferences/com.apple.loginwindow.plist..."
		# Make the users whose homefolder the plist is located the owner of the file
		sudo chown "$userFolders" /Users/"$userFolders"/Library/Preferences/com.apple.loginwindow.plist
		echo "Made "$userFolders" owner of the file /Users/"$userFolders"/Library/Preferences/com.apple.loginwindow.plist..."
		echo ""
	fi
done