Mossberg: Running Windows 10 and macOS Sierra together

I’m writing this paragraph in Word for Windows on Windows 10. The process is as smooth as you’d expect on PC hardware built for Windows, with no hesitation or freezing, and all the features are enabled. But I’m not using a Windows PC; I’m using a three-year-old MacBook Air. And I haven’t had to give over the Air entirely to Windows. Instead, I’m running Windows 10 and its apps concurrently with the brand-new macOS Sierra. For instance, the Windows version of W