Fall is around the corner, which means a new version of OS X is almost here. That also means a new version of Parallels, the software that lets you run Windows on a Mac, is almost here, too, and this time there’s a big emphasis on speed. With Parallels Desktop 10 installed on your Mac, you won’t just be able to run Windows on a “virtual machine” within your Mac, you’ll be able to do it significantly faster then previous generations. Windows documents open 48% faster, and Office 2013 apps launch 50% faster, the company claims. At the same time, battery life is extended up to 30%, and the Windows “machine” uses 10% less memory.