Resolving Mac OS X Leopard Compatibility with Linksys Router

Recently changed my wifi router from a TP-Link to a Linksys E1200. All my mobile devices linked to it immediately with no problem.

All desktops on Windows and laptops on Windows and Mac OS had no problems -- except an old Macbook with Mac OS 10.5.8 (Leopard). Browsing was glacial, if not, frozen. Tried changing DNS settings to no avail. Whether Safari or Google Chrome, the web pages won’t load and the browser just hung.

Finally found the solution. Under System Preferences > Network, click on the TCP/IP tab. Then set “Configure IPv6” to “Off”.

Voila! Now the Mac is surfing!