How to Clear a Browser's Cache on a Mac. One reason the World Wide Web is often called the World Wide Wait is because your browser keeps too much information in memory. You can adjust that. Here's how.
In Microsoft Internet Explorer, click on the Edit menu, then select Preferences, followed by Web Browser, then Advanced.
On Netscape Navigator/Communicator, click on the Edit menu, then select Preferences, followed by Advanced, then Cache.
Empty the cache (for either browser) by clicking on the Empty button. You can also raise or lower the cache size (you can even set it to zero).