I don’t see built-in speakers as an option in the Output window

Hello, shadi1979,

Thanks for using Apple Support Communities, it's great to have you here.

We want to help you get audio working as expected on your MacBook and have some troubleshooting steps that we think might do the trick. To start, we'd recommend that you work through the steps in the following article: If the internal speakers on your Mac aren't working - Apple Support The information in that article has proven beneficial in the past, so we recommend it as a starting point.

If you're still not having any luck, however, you can also try testing the audio output issue in a new administrator account. Testing an issue this way can help isolate the issue, determining if it's happening on your whole system or just one user account. This is a great way to isolate an issue so you can better resolve it. Here is how you can create a new user account: Change Users & Groups settings on Mac - Apple Support

We hope that this information is helpful.

​Have a great day!