Upgrade to Mojave from mountain lion
MacBook pro mid2012 isx 10.8.5 new HD installed w old factory settings, cannot upgrade to high Sierra or Mojave.
Have tried clicking on the Apple menu, no app updates available.
From app store, clicking on Get from Mojave page I get a "verification required" message requesting billing info verification. Clicking on the billing information button, I get a 'software update required' message. To make changes to billing info an update to the latest version of Mac os... Cannot even access iTunes because it says that the file iTunes library. Itl file cannot be read as it was created by a more recent version of iTunes. What to do?
MacBook Pro