Upgrading Old Macbook Air
I have a MacBook Air mid-2012 with X El Capitan 10.11.6 OS. Is there any way to upgrade this OS? I have Safari 11.1.2 which is not working when I try to log in certain sites.. I want to upgrade Safari but looks like I need to upgrade OS first. There is no update on Apple Store for this mac. Any advice will be appreciated.
MacBook Air 11″, OS X 10.11