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In the last few weeks I’ve been in a situation twice where only one person had Internet access (me) and needed to share it with other people or devices. The first time we were at a convention center and only had wired internet access at the booth. We had several iPhones we needed to use to display a website (we were demoing a new mobile website). The second time our wireless router went out in the office and only a handful of computers are running on a hard-wired ethernet connection.
In both cases, we needed to access the Internet and having a Mac saved the day. It was extremely simple and quick to share my internet connection on my MacBook Pro using built-in features in Mac OS X.
To share an internet connection over Airport, you will need to be connected to the internet by either a wired ethernet connection or by a cellular card. I used a Verizon V740 card to share the internet connection at the convention and hard-wired ethernet connection at the office when our router went out.
So how do you share your Internet connection using Mac OS X? See the tutorial below, or take a look at the video.
Open the preferences pane and click “Sharing”:
Click on the name “Internet Sharing” which will bring up the internet sharing information to the right of the preference pane:
Choose the type of internet you want to share (I have “Built-in Ethernet” selected to share):
in the “To computers using:” section check the box labeled “Airport”:
If you want to name the network, set encryption or a password, click “Airport Options…”:
Once you have configured the settings, check the box next to “Internet Sharing” on the left and you will be prompted with a warning: “Are you sure you want to turn on Internet sharing?” Click Start.
Now your internet connection should be shared. In place of your normal WiFi signal strength indicator you should see the icon on the right.
Also check out the video: