Since I have a Macbook Air and an iMac I have to wait to install the software. However, I spoke with Microsoft and they assured me that it will work & if it doesn't they will give it over to a senior engineer. As long as I have the original disk and serial number, they have no problem with it. BTW, just for your knowledge they have cleaned up their act and assist customers with reinstallation issues. So if you ever have a problem they will help you. I had a senior engineer that worked with my son's old laptop with Vista and scheduled phone calls at my convenience to troubleshoot. It's nice to know that Apple and Microsoft have made peace with each other......