Mac or PC

No there is no advantage with the Mac other than its superior operating system that will require a lot less maintenance.

A Mac is still a computer which run software Mac are more tightly controlled so there is less hardware and software Apple has it good points as well as it bad points.  Less may be better.

If you go visit the Adobe forums site an go the the Photoshop forum you will find many Mac users are having problems with  the latest Mac OS and Photoshop.  In fact to me it looks like Mac users are having more problems then PC users.  Don't know if the problems are with to OS or Adobe for Adobe is very quick to point their fingers. CS6 has more then its share of bugs the for sure.

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JJMack