How to I update my macOS from 10.13.6 to 10.14 or later?
how to I update my macOS from 10.13.6 to 10.14 or later? I have mac air 2015. My system says there's no new update available. My new Turbo tax software has to be 10.14 or later to run.
MacBook Air 13″, macOS 10.13
