Hi there tonyinsc,
If you can't turn on or connect to Wi-Fi on your Mac, start by working through the suggestions below to see if they resolve the issue for you:
* Make sure Wi-Fi is turned on. You can use the Wi-Fi status icon
in the menu bar to turn Wi-Fi on.
* You may be out of range. Make sure your Mac is within range of the wireless network.
* The Wi-Fi service may not be available in Network preferences.
* On your Mac, choose Apple menu
> System Preferences, then click Network.
* If Wi-Fi isn’t in the list of network connection services, click the Add button
at the bottom of the list, click the Interface pop-up menu, then choose Wi-Fi. Name the Wi-Fi service, then click Create.
* If you are connecting to a wireless network created by an AirPort base station or AirPort Time Capsule, restart the device by unplugging the power cord. Wait a few minutes, then plug the power cord back in. After the network is available, try connecting again.
You'll find this information here: If you can’t connect to a Wi-Fi network on Mac - Apple Support
If that doesn't seem to help, try the additional troubleshooting steps here:
Troubleshoot joining a Wi-Fi network on Mac
Here are some things to check if you’re having trouble connecting to a Wi-Fi network.
* If the network is protected with a password, make sure you know the correct password and the type of wireless security for the network.
* If you’re joining a hidden network (a network with its name hidden), make sure you have entered the network name and password correctly. See Join a hidden Wi-Fi network on Mac.
* If the network is secured by access control, make sure your computer’s MAC address is registered with the network administrator.
* Make sure you’re in range of the network you want to join. The typical range of a wireless network is 150 feet, but range may vary based on the environment.
You'll find those steps in this support article: Troubleshoot joining a Wi-Fi network on Mac - Apple Support
Also, make sure you've tried restarting your Mac with the steps here: Log out, sleep, restart, or shut down your Mac - Apple Support
If you're still unable to turn on Wi-Fi after working through all the suggestions above, contacting Apple Support directly is the next step toward a solution. They're best-equipped to take a closer look and provide some additional guidance. This link will help you get started: Apple Support
Take care.