A new version of macOS, Catalina, will be released soon.
Caldera does not support this macOS version yet.
All customers are advised that they must NOT update their current Caldera installation to this new version or the Caldera software will not work as expected.
In the event that you accidentally update your OS, you will find that the current USB installation and ISO image of Caldera will refuse to install. You will then have to revert to a previous version of macOS and reinstall.
Rest assured that we are working quickly to ensure that a new version of Caldera that can be installed on macOS Catalina will be released as soon as possible.
Thank you for your understanding,
The Caldera development team
You can consult the OS compatibilities page