How to setup Yahoo mail on a Mac using Mac Mail.

Step 1:Choose Apple menu, System Preferences, and then click Mail, Contacts & Calendars.
Step 2: If you have already added an account, click the Add Account button.
Step 3: Select an account type, In this example we are choosing Yahoo.
Step 4: Enter your account information, and then follow the onscreen instructions.
Step 5: Choose the apps you would like to use with your mail account.
Do you want Chat? Do you want Calendars?

How to connect to file servers, computer shares or Windows shares on a Mac.

This video is a step by step guide on how to connect to file servers or Windows server shares on a Mac.
Step 1: Click on go.
Step 2: Connect to a server.
Step 3: Type in the Ip address of the server or PC you want to connect to.
If you are connecting to another Mac use this format.
If you are trying to connect to a Windows PC or Windows server use this format.

To browse available shares that are on the same network as you. Do the following steps.
Step 1: Click on go.
Step 2: Go to Connect to a server.
Step 3: Click Browse
This will allow you to browse other PCs on the network that have enabled file sharing.