Back up your data, check your applications for compatibility, and if your iMac is a 2012 or newer model, click on Mojave. If you get a Mac App Store preview page, change the https at the beginning of its address to macappstore.
Back up your data, check your applications for compatibility, and if your iMac is a 2012 or newer model, click on Mojave. If you get a Mac App Store preview page, change the https at the beginning of its address to macappstore.