latest operating system for my old Mac book
I have a 2013 Mac book which is running OSX Elcapitan ver 10.11.6.
Im getting 'un secure' messages when on google etc.
Security isn't good enough for making payments etc
How can I find out the most unto date operating system that my ageing
Mac book can handle???
Many thanks for your help
MacBook Pro 15″, OS X 10.11