It looks as though the next version of macOS is getting a dark mode, along with a few other interesting additions. Just ahead of Apple's upcoming Worldwide Developer Conference (WWDC), developer Steve Troughton-Smith came across a 30-second preview video on Apple's servers that should have been hidden, but was accidentally made viewable. The video shows Xcode 10 running on macOS 10.14.

Also visible is an Apple News icon in the dock, as currently found in iOS. The presence in the video seemingly indicates that Apple is porting its Apple News app over the Mac in desktop form. In addition, it looks like Apple is enabling video previews in macOS 10.14, with a redesign of the Mac App Store so that it looks similar to the App Store as currently featured on the mobile side (iOS 11). Lastly, it appears as though the background picture could be of a nighttime shot of the Mojave Desert. If that is the case, it could hint at what Apple plans to call macOS 10.14. Reinforcing that notion is the recent discovery of a presumed shell company for Apple filing to trademarke several California landmark names, including Mojave. So, don't be surprised if Apple ends up calling its next update macOS Mojave.