I have notice that I got many visitors who is using Mac Os X integrated browser “Safari”. The browser itself is a very conditioned and follows all the w3c standards.
The problem with it is that not all web developers can check their sites on it, because there is no Windows port of Safari (only some rumors about Apple plans).
Personally, I have found a friend with Mac ) thanks to him, but I also have found a good resource which should help you to see how is your web resource looks in Safari browser. The resource iCapture was actually down when I have try to use it =) but this is because of server overloading.