before:
Apr 09 22:40:38 m2air systemd[1]: Using hardware watchdog 'Apple SoC Watchdog', version 0, device /dev/watchdog0
Apr 09 22:40:38 m2air systemd[1]: Failed to set watchdog hardware timeout to 10min: Invalid argument
Apr 09 22:40:38 m2air systemd-shutdown[1]: Using hardware watchdog 'Apple SoC Watchdog', version 0, device /dev/watchdog0
Apr 09 22:40:38 m2air systemd-shutdown[1]: Failed to set watchdog hardware timeout to 10min: Invalid argument

with patch:

Mai 06 17:30:05 m2air systemd[1]: Using hardware watchdog 'Apple SoC Watchdog', version 0, device /dev/watchdog0
Mai 06 17:30:05 m2air systemd[1]: Watchdog running with a hardware timeout of 10min.
Mai 06 17:30:05 m2air kernel: watchdog: watchdog0: watchdog did not stop!
Mai 06 17:30:05 m2air systemd-shutdown[1]: Using hardware watchdog 'Apple SoC Watchdog', version 0, device /dev/watchdog0
Mai 06 17:30:05 m2air systemd-shutdown[1]: Watchdog running with a hardware timeout of 10min.