I bought Office 2011 for mac from a reputable academic download company. I downloaded the file today and tried to launch the disk image, but when I do I just get a message that it couldn't be launched because it is 'unrecognised'. Why? I did a Yahoo search but couldn't find an answer. Would some bright spark amongst you please come to my aid? I am using a new MBA running Snow Leopard, if that makes a difference. Thanks in advance!