csrutil disable
Restart computer
In the terminal, type
sudo open /Applications/TextEdit.app /System/Library/LaunchDaemons/com.apple.ManagedClient.enroll.plist
change
<key>com.apple.ManagedClient.enroll</key>
<true/>
to
<key>com.apple.ManagedClient.enroll</key>
<false/>
So that the changes take effect
Disable annoying Remote Management Pop-Up after upgrading to macOS Sonoma (14)
Apple further added a new gate preventing people from using their DEP-enabled Macs without installing the profiles in macOS Sonoma. After upgrading from a fully-working Ventura copy (with MDM servers blocked in hosts) to macOS Sonoma DP 1, your Mac will want to give you a pop-up window every 10 mins reminding you to install a DEP profile. Did some experiments and I think Apple is secretly pinging their MDM servers no matter you have an active profile associated w/ SN or not. As long as the servers are not reachable they will annoy you with their new pop-up system.
The Workaround
(1) Disable SIP in 1 True Recovery
(2)
sudo rm /var/db/ConfigurationProfiles/Settings/.cloudConfigHasActivationRecord
sudo rm /var/db/ConfigurationProfiles/Settings/.cloudConfigRecordFound
sudo touch /var/db/ConfigurationProfiles/Settings/.cloudConfigProfileInstalled
sudo touch /var/db/ConfigurationProfiles/Settings/.cloudConfigRecordNotFound
(3) you're all set. enjoy this boring upgrade