The Mac OS is designed to run only on Apple computers, and is less subject to hardware and software errors.
Since it is so common, many hackers are familiar with it, so updated security features are important.
On the downside, it is still relatively costly, and some older versions like Vista will run terribly slowly on newer machines. The Windows OS has undergone many changes and versions, and for the advanced user it also has more management features than you may need. You won't find it difficult to obtain software or support.
