Just purchased a new iMac with M1 chip and executed migration assistant to transfer everything from old Mac to new one. When I try to open a PDF, It displays the "Sign In Required" screen and when I click 'Sign in Now', the window expands to a completely blank rectangle except the title bar naming Acrobat Licensing Application. Any ideas on what to do??
Thank you for reaching out and sorry for the trouble.
As you have mentioned, you have recently purchased the new iMac and when trying to access the Acrobat you receive the blank Acrobat Licensing Application window. The issue occurs when the directory permissions are modified when you migrate orupgrade from older OS. Please try the troubleshooting steps suggested in the following help document: https://helpx.adobe.com/in/acrobat/kb/licensing-application-hangs-mac.html.