Today, the year-old Parallels Desktop 11 still fully supports Windows 10, even after the Anniversary Update recently pushed out by Microsoft. Without Coherence Mode, Windows applications are all contained in a single window that displays Microsoft's whole operating system. That's because Parallels 11 was the only version to support Windows 10 in Coherence Mode, which lets Windows applications run on a Mac in their own windows and integrate with the Mac's Notification Center. There was an obvious reason to upgrade to Parallels 11 last year for people who wanted to run Windows 10 on a Mac. For that use case, last year's Parallels Desktop 11 release is still good enough.
While Parallels can run just about any operating system in a virtual machine, its primary purpose is letting Mac users run Windows applications. Parallels Desktop 12 for Mac is thus being announced today, but there isn't much to be excited about. The new versions often coincide with major new Windows and Mac operating systems, requiring major software changes to bring new Windows features to Apple computers or to make sure everything keeps working properly. Like clockwork, Parallels releases a new version of its desktop virtualization software for Mac computers every year.