Beta testers who signed up for Apple's beta testing program can download the macOS Mojave beta via the Mac App Store software update mechanism. Subsequent betas are installed in a different way, using the Software Update icon in System Preferences.
Those who want to be part of Apple's beta testing program can register to participate via the beta test website, which gives users access to iOS, macOS and tvOS betas. Potential beta testers should make a complete Time Machine backup before installing macOS Mojave, and it should not be installed on a primary machine because betas are unstable and often have serious errors.
Today's macOS Mojave update introduces several new wallpapers that are suitable for use with Dark Mode. There are several wallpapers that contain pictures of the Mojave Desert, along with new abstract oil-musical wallpapers, new dark flower backgrounds, images that have been used to promote newer Mac updates, and more.
macOS Moja's main novelty is a system-wide dark mode, which gives Mac users a new way of showing the operating system. A newly upgraded Mac App Store makes it easier than ever to discover great apps, while Dynamic Desktops gives you background images that change subtly throughout the day.
An improved Finder window with Gallery View, Sidebar, Quick Look and Quick Actions makes it easier to manipulate, edit and organize your files while Desktop Stacks organizes all the files on the desktop.
Applications, Applications, Product, Home and Voice Notes have come to Mac in Mojave, and for the first time you can use Siri on Mac to control HomeKit products. Group FaceTime, an iOS 12 feature, is also available in Mojave, allowing you to chat with up to 32 people at a time.
Apple keeps your data safer than ever with new security and privacy improvements, and Safari in macOS Mojave makes it much harder to track you through part / similar buttons and through system configuration.
MacOS Mojave is compatible with 2015 and newer MacBook Air, MacBook Pro, Mac mini and iMac models, 2017 iMac Pro and Mac Pro models from late 2013 and mid 2010 and mid-2012, models with metal-compatible GPUs.
Mojave will be available in a beta capacity in the next months, so Apple can solve bugs before a fallout.