Browser Camp allows you to test your website appearance and interaction remotely on all the major browsers on a Mac.
Give it a go for free. You can get a free screenshot of your website on Safari at a resolution you specify.
Of course, this falls in line with what made selling remote testing on the web popular, (http://www.browsercam.com/). You can test on browser/ OS combinations here. It still has the 24 hour free trial till date. A year’s license is currently available for $99.