No. You can buy 3rd party virtualization software like Parallels (http://parallels.com) and VMware (http://vmware.com) which does let you run Windows and OS X side-by-side. However most graphics-intensive programs, including most major Windows flight sims, will not run under current virtualization software. A few sims, such as Aerofly Pro Deluxe, ClearView and FMS, will work under Parallels, but they run much slower than if you boot directly into Windows. I've personally tried ClearView and FMS running under Parallels 3.0, and while they work I found the framerates to be too low for them to be enjoyable to use. For instance if I run ClearView booted directly into Windows on my MacBook Pro, I get about 220 FPS, but when I run it under Parallels, I get about 25 FPS, which for me is barely usable.