I develop a lot in Excel VBA and I'm on Office 2010 with Windows and I have purchased Office 2011 for Mac. In fact it is an impressive decline. You end up with a sloppy excel 2003. For example ActivX components are not present ... Another example: in VBA property Rowsource does not exist. To feed a combobox for example, you have a piece of code, we would s past. Indeed compatibility mac / windows n esxiste not. It is certain that for those who use Excel to make additions, it does not cause problems. But in this case, Numbers is more than enough. I'm a little disappointed that I had to rewrite most of my code. It is not tomorrow that I spend in office 365! Otherwise, the Amazon service was impeccable!