How do I set up Comcast Mail on Mac?

Select Mail icon from the dock.

Email address: your @comcast.net E-Mail address
Incoming Mail Server: mail.comcast.net
Mail Server Type: select POP3
User Account ID: Your User Account ID is everything leading up to, but not including the @comcast.net part of your E-Mail address. For example, if your E-Mail address is iptouch@comcast.net, you would enter iptouch as your User Account ID.
Password: your password
Outgoing (SMTP) Mail Server: smtp.comcast.net

Click on OK to save the mail setup.

Click Mail from the top menu, and select Preferences from the drop-down list

Select Add Account on Account window

Select Account Information tab on Add Account window. Select Account Type as POP  from drop-down menu. Enter your Email address and full name in fields Email Address and Full Name. Set Incoming Mail Server as mail.comcast.net. User Name is everything leading up to, but not including the @comcast.net part of your E-Mail address. For example, if your Email address is iptouch@comcast.net, you would enter iptouch as your User Name. After entering your password, select smtp.comcast.net from the drop down Outgoing Mail Server. Click on Options...

On the SMTP Server Options screen, enter smtp.comcast.net as your Outgoing Mail Server. Make sure that Authentication is set to Password (or None if you do not want password protection) and enter your email user name and password in the designated fields.  Click OK to return to the Account window.

Click OK when you return to the Account Information screen, and then close the Accounts window. You can now begin sending and receiving your Comcast Email.