On the heels of releasing security updates for previous versions of Office, Microsoft on its blog Tuesday said that the 2011 version of the Office for Mac suite will be 32-bit only. The focus of development has been on improving compatibility between Mac and Windows platforms, according to product unit manager Jake Hoelter, and so Office has not been completely transitioned over to Cocoa. Unless the entire suite is written in Cocoa, it cannot take advantage of 64-bit processing.