Do I need to install macOS Mojave?

Many users will want to install the free update today, but some Mac owners are better off waiting a few days before installing the latest macOS Mojave update. Even though macOS Catalina arrives in October, you shouldn’t skip this and wait for that release. With the release of macOS 10.14.

Does installing macOS Mojave delete everything?

The simplest is to run the macOS Mojave installer, which will install the new files over your existing operating system. It won’t alter your data, but only those files that are part of the system, as well as bundled Apple apps. …