webpage looks a bit different on a mac

[Captainkewl]

Hey everyone. By using a conditional comment, I have my website looking the same in firefox and IE on a PC. However, on a Mac, the text is a bit off (I have attached screenshots). Safari and firefox on a Mac are moving some of the text on me. Is there a way to make my site look how I want it to on both a PC and a Mac?

Thanks. (see screenshots if needed).

[Captainkewl]

Here is the URL http://kmkwebdevelopment.com/cookiediva/home.html I have also attached the css for the home page.

Thanks.