added comma-separated list of pending software updates to display in user-facing dialog boxes
added basic Apple Silicon architecture support #45
script prompts for manual update action, opens System Preferences - Software Update, and repeats until no recommended updates are detected or the system is restarted
moved check_for_updates run before FORCE_DATE check (prevents the deferral countdown clock from starting until after update cache has finished on first script run)
switched default logo path to use /System/Library/PreferencePanes/SoftwareUpdate.prefPane/Contents/Resources/SoftwareUpdate.icns (Big Sur does not have an icon for the Software Update app)
check_for_updates
run beforeFORCE_DATE
check (prevents the deferral countdown clock from starting until after update cache has finished on first script run)/System/Library/PreferencePanes/SoftwareUpdate.prefPane/Contents/Resources/SoftwareUpdate.icns
(Big Sur does not have an icon for the Software Update app)