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Unable to Login after Mac OS Catalina Update

Overview


After upgrading Mac OS to Catalina the Optuma program will not load within Parallels, instead a small information window is displayed briefly before the program is closed:



Additionally when you attempt to install / reinstall Optuma within Parallels a decompression error is encountered: 




Cause


macOS Catalina 10.15 introduced more privacy restrictions, Parallels Desktop application needs additional access to be able to work as before.

Solution


On Mac menu bar click on Apple logo > System Preferences > Security & Privacy > unlock settings by clicking > on the left side scroll down and select Full Disk Access menu > on the right side put checkmark for Parallels Desktop.

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