Acrobat 9 Pro, downloaded but won't open. Help!
I am using a Mac, OS X El Capitan, 10.11.6. It appears that the download was successful, so I opened the dmg file and then dragged the Acrobat folder to my applications folder. I opened the Acrobat folder and double clicked on the Acrobat icon, but it doesn't open. The "Read Me" instructions say that a dialogue box is supposed to open so I can accept the license agreement and enter my serial number. But nothing at all happens when I double click on the icon. Save me!
