The second public beta arrives just 10 days after the first was made available for download. Once you register for the Apple Beta Software Program, you can update to macOS Mojave by entering System Preferences and using the Software Update option.
This year’s macOS update mostly focuses on productivity and includes new features like Stacks and an all-new Dark Mode. It also includes macOS versions of the iOS apps Home, News, Stocks, and Voice Memos.
The first official version of macOS Mojave should launch this fall alongside new versions of iOS, tvOS, and watchOS.