Finally, the much waited app for Mac OS X is available for download. Earlier today, Microsoft has announced retail availability of Office 2011 for Mac. It comes in two flavors, Microsoft Office for Mac Home and Student 2011 which Costs: $109 for a single license, $129 for 3 and Microsoft Office for Mac Home and Business 2011 which Costs: $174 for a single license, $239 for 3.