My cousin said to me the other day that he and his wife were evaluating laptops.  They considered purchasing a Macbook but decided not to because Microsoft Office products don't work on Apple Computers. "Err!!"
 
Microsoft Office has had a long history running on the Mac platform.  In fact when Excel was first introduced it only ran on Apple computers.

Word, Excel, and Powerpoint all run on Macs.  The Mac version of Outlook is called Entourage.  I personally find Entourage more useful than it's Windows counterpart because it has project management capability. 

As of this post the most current release of Office for the Mac is 2004.  Microsoft maintains a website were you can find information about Microsoft Office Mac 2004 here.

Microsoft has an upcoming release of Office Mac scheduled for January 2008.  You can sneak a peak at Microsoft Office for Mac 2008 here