having the same issue we nailed it down to 802.1x issue were the Mac's
were failing there auth to many times and then being moved to a locked
down vlan with not network access,Apparently this is the standard
approach 802.1x systems do for multiple fa...
2021-06-03 09:54:20+08 Name SoftwareUpdateNotificationManager:
SUOSUShimController: Notification manager client, proceeding with
countdown notification flow without confirmation2021-06-03 09:54:20+08
Name softwareupdated: No matching produ...