I have tried to run ArcGIS online from an ArcGIS home user installation on Windows XP and Windows 7 on my Mac with Virtualbox 4.3.2 running Mac OS X 10.9.1. It hasn't worked for the last three months. At the ESRI DC Federal conference, I see one of your presenters is able to use ArcGIS online on Parallels on a Mac. Not everyone can afford Parallels. From a training perspective, you need to allow Mac users to use a free virtualization solution on their Mac, such as Virtualbox that only costs a Windows license. People who are getting educated have very limited resources in terms of spending. And the Mac has become a key platform. When I try to run ArcGIS online link from ArcGIS desktop, the application just crashes with an error the moment I select ArcGIS online from any menu, or submenu of the layers. It asks me to report the error to ESRI.