OS X now includes a built-in Firewall. The Firewall will help keep your system safe from hackers, especially on unknown networks. This video tutorial shows you how to enable the OS X application firewall and configure it for proper use.

In an earlier installment, we showed you how to download a program using the Safari web browser. In this episode, we show you how to install it into the applications folder.

Apple has done an excellent job creating a secure multi-user system in OS X. Each local user has their own folder that remains isolated from the rest of the system.

From time to time, you may need to share files between your users. This is accomplished two ways. If you need to share with a single user, you can use the Drop Box. If you want to share files between all of the users you can use the shared folder.

The following video demonstrates how to use the Finder to share files using both methods.