For web designers who don’t have access to a Mac OS X machine, you might be interested in the Swift browser which is a ported version of WebKit. The same engine Apple uses for Mac OS X’s Safari web browser. The port is very alpha quality, but it at least allows you to see how your site renders in Safari.
At the time of this writing, the site was down. However I was able to download the msi file and install it. If you would like to install Swift, you need to know that VisualC Runtime engine is required for the browser to even load. If the main site is still down, you can download the 0.1 msi installer in rar format from this site.