Acrobat DC for mac puts up a black screen over my pdf when signing or securing
On only one of my Macintosh desktop machines, Adobe Acrobat DC will not allow me to sign my own documents or secure a document with a password. When I click on the "sign document" tab, a dark screen takes over the document and prevents further action, causing me to have to "force quit" Acrobat. When I attempt to secure the document with a password, clicking the secure with password tab results in the same action, except there is a white box in the center. It is as if there is supposed to be a message there, but nothing appears. Again, the program needs to be forced to quit. Similar descriptions in the forum suggest fixes for the Windows version. None seem to have helped for me, though opening a document with the web version will allow me to sign the document.
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