I understand the issue you’ve encountered.
When a locked Mac powers back on after its battery has completely drained, its internal system clock can reset to Epoch time (00:00:00 UTC, January 1, 1970). Because the Mac is still locked, it cannot automatically connect to Wi-Fi and synchronize its date and time with Apple’s Network Time Protocol (NTP) servers. As a result, macOS calculates the lockout period incorrectly, causing the “Try again in” timer to display an unusually large value. This lockout is not controlled by Hexnode UEM.
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Connect the locked Mac to a wired Ethernet connection.
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Leave it connected for 10-15 minutes so that the system clock can synchronize with Apple’s NTP servers.
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Restart the Mac. Once it starts up again, the lockout timer will be cleared.
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Enter the 6-digit PIN used for the Remote Lock, which can be retrieved from Action History in Hexnode UEM.
Please try the above steps to recover the Mac. If you continue to face any issues, feel free to reach out.
Regards,
Lara Welsh
Hexnode UEM