Changes the macOS theme to Light mode in Mojave.

Set Light Mode.sh

#!/bin/bash

# This requires the parent process to have "System Events" enabled in TCC. When
#   running this from Addigy, /Library/Addigy/go-agent will need that
#   whitelist.
username=$(/usr/bin/python -c 'from SystemConfiguration import SCDynamicStoreCopyConsoleUser; import sys; username = (SCDynamicStoreCopyConsoleUser(None, None, None) or [None])[0]; username = [username,""][username in [u"loginwindow", None, u""]]; sys.stdout.write(username + "\n");')

# Do nothing if no one logged in.
if [[ "$username" != "" ]]; then
    # Tell "System Events" to change to light mode.
    sudo -u "$username" osascript -e 'tell app "System Events" to tell appearance preferences to set dark mode to not dark mode'
fi