Macs don’t run iOS. Common mistake, but iOS is for iPhones and iPads. Macs run Mac OS.
What version of Acrobat Reader do you have?
I've been having the same issue. I have the 2018.009.20050 version. Whenever I try to open a document in reader, the application opens but displays no screen. Acrobat Reader is dispIayed in my toolbar but no document. I have attached a screen shot of what I see when I try to open a recent document:
And it is not displaying anything in this view either:
1 person found this helpful
When Acrobat Reader is shown on the menu bar, as in the first example, go to the Window menu and see if options like Tile help you. Some people find documents open, but off screen, especially if a monitor or projector was once plugged in.