Need to access Windows XP or Vista? Have programs that only run on Windows, but love your MAC. Ya, we get it and agree. Run Windows and OSX on the same computer using Bootcamp, Parallels or other software. You can run simultaneously or separately depending on your needs. Parallels and simultaneous boot of both OS will drain your RAM so make sure you upgrade memory before endeavoring. Learn how to use Boot Camp in Mac OS X to set up a drive partition to allow you to run Mac OS and Windows on your computer.