Some iMac takes 2 hours to start

[BOLLESTORE17]

I don’t know why the iMacs take so long time to start. They display checking policies. Someone can help?

[mickgrant]

i would start by trying to find out which policy/s are taking so much time.
to do this i would look at all your policy's triggered by start up and turn them all off, and add them one at a time till the hang occurs.
once you have it narrowed down check to make sure that its all set correctly correct

[BOBW]

@BOLLESTORE17 you could look at the Jamf logs at /var/log/jamf.log
even better you can see them going through live if you SSH into the machine prior to login or during startup
ssh "managementaccount"@"IPADDRESS" then do tail -f /var/log/jamf.log

this should give you some idea if there are multiple policies triggering