Wifi is not connecting to Mac

Hello, laxmi16!

Thanks for reaching out to the Apple Support Communities! It sounds like you're having an issue connecting to Wi-Fi on your Mac. Check out this article If your Mac doesn't connect to the Internet over Wi-Fi. This article has excellent steps you can take to troubleshoot issues getting connected through Wi-Fi.

I would also take a look at this article to Resolve Wi-Fi and Bluetooth issues caused by wireless interference to be sure there is nothing interfering with the connection.

If there is no interference, I recommend taking a look at this article with steps to follow for How to use safe mode on your Mac. This will perform checks and stop certain software from starting up automatically. Once you are in safe mode, test to see if you have the same issue. 

Let me know the results and have a wonderful day!