update existing website to work on apple machines

Need to update site so that it looks the same on a Mac or ipad as it does on a windows machine. The person working on this project must have both types of machines so they can make sure that the results will look the same. Would also like to have the car come out from the side of the page sooner. If you are able to make the page load quicker that also would be nice. The primary goal is to make the site look the same on apple products as it does on window machines. The website is: David-Hearne.com.