Did you know that you can use turn your Mac into a Wi-Fi hotspot? You can. Here’s how:
Click the Apple logo in the top-left-hand corner of your display and choose “System Preferences.”
In the System Preferences window, select “Sharing.”
Then select “Internet Sharing” from the list of services.
On the right side of the screen, pick the source of your Internet connection.
Make sure Wi-Fi is selected in the “To computers using” box.
Note that you should be sure that you want to turn on Internet sharing. If your Mac is connected to a network, turning this on may affect the network settings of other computers and perhaps even disrupt the networks.
Click “Wi-Fi Options” at the bottom of the window to configure your Wi-Fi hotspot. You can change the network name and Wi-Fi channel, if you wish.
Click “OK” to close the window and select the checkbox to the left of Internet Sharing to activate the hot spot.