Among other fixes Apple has put out a total of 51 patches, 41 of which tackled vulnerabilities in the Mac OS X operating system. Among these 41 patches about 15 are rated as extremely critical i.e. can lead to a system being completely compromised. The remaining 26 deal with various other problems like “drive-by” web hacks to system oriented hacks which have to be maliciously applied by a person sitting on the machine.
The remaining 10 fixes are for their Safari browser. These include fixes for “Cross-site scripting” vulnerabilities and other “drive-by” hacks. One of these updates was however crucial because it permitted remote code execution.
For further details please head on to this security advisory.
well i own a mac and honestly there isn't a single software that i have used on windows that i have not managed to get for the mac or probably a better replacement...mac OS makes life surely simple and easy...and i know that i have not regretted it till now. 
