While installing a Creative Cloud app on Mac OS, the installation fails with the following error message:
"Fatal Error '123' occurred while download"
If you receive a message stating that you cannot uninstall the Creative Cloud desktop app because it is used by other applications, you are using the uninstaller and not the Creative Cloud desktop app uninstaller utility. Download and run the Creative Cloud desktop app uninstaller utility instead.
If the solution above does not resolve the issue, you can try downloading the application directly. You'll need to enter your Adobe ID and password to access the site.