I have a iMac (27-inch, Late 2013) on 10.10.5 and I am not sure how to upgrade to a more recent version. When I check for software updates it says no updates available. Any help would be appreciated.
I have a iMac (27-inch, Late 2013) on 10.10.5 and I am not sure how to upgrade to a more recent version. When I check for software updates it says no updates available. Any help would be appreciated.