Macworld spoke with several representatives of the company’s Mac Business Unit, who told us the company is focusing on three things with this new release: better compatibility across platforms, improved collaboration tools, and a more refined user interface. The new product, Microsoft Office for Mac 2011, will arrive in time for the 2010 holiday season. Microsoft provided the most extensive look yet into the next version of the Mac version of its popular Office suite on Thursday at Macworld 2010.