my MacBook did t start

Hi Emilyatallah.

Welcome to the Apple Community.

Wondering which Mac Book model (Year) you are using,

and

which Mac OS version is installed

and

what happened, (if anything), when you Mac shut down.

and

if you got an error message either before it shut-down or when you tried to start your MacBook.

You might want to see if Apple Support's articles help you start using your Mac again:

What to do: If your Mac doesn't turn on – Apple Support

and

If needed:

Ways to start up your Mac – Apple Support

If you need more help:

You might want to reach out to the MacBook Support Team:

There is a "Get Support link (or download / use the app) on their webpage (link below)

MacBook - Official Apple Support

All the best :-)

Thank you for letting us know you were able to solve the situation!

Cheers :-)