If your Web browser, email program, or any of a hundred other Internet-connected apps on your Mac starts complaining about not having a connection, you may have to do a bit of sleuthing to figure out the cause. After all, a disruption anywhere along the chain between your Mac and a distant server could cause an outage, and it's not always obvious where to look.Related StoriesHow to disable Java on your MacWhy the iPad still can't be a true Mac replacement
