update problem
how to update OS X EL CAPITAN 10.15.6 as i am using 10.11.6 Thanks
MacBook Air 13″, OS X 10.11
If you want El Capitan here is a link to the apple support article Where you can download MacOS El Capitan https://support.apple.com/en-us/HT206886. If you would like macOS Catalina here is the link https://www.apple.com/macos/catalina/