can't update os from Big Sur to latest os
I've never been able to update my MacBook air's operating system from original os Big Sur. It will download but will not install. When asked to press "continue" to continue installing nothing happens. I know sometimes it can take a while but I've waited for as long as 2 days and still nothing. I am NOT tech savvy so any replies please bear this in mind...thanks in advance!
MacBook Air 13″, macOS 11.7