My Mac is currently on MacOS High Sierra, version 10.13.6 and when I click Update Software it takes me to App store but no OS software shows availa
My Mac is currently on MacOS High Sierra, version 10.13.6 and when I click Update Software it takes me to App store but no OS software shows available. What steps are necessary to update the OS software?
iMac 21.5″, macOS 10.13