My MacBook will not start up

Hi rja7227,

Welcome to the Apple Community.

where some of us do our best to help each other troubleshoot.

Wondering

• which MacBook (year) you are using,
• which iOS is installed on the MacBook
• what you were doing when you last used the Mac (shut down ? crashed ? froze ? error message ? update failed ?)
• what you have tried when the Mac wouldn't start,
• if you contacted Apple Support after reading the article you came here from, and what Apple said about your Mac.

Apple support have articles online that may (or may not) help.

If an error occurred while updating or installing macOS:

https://support.apple.com/en-au/HT212526

Ways to start up your Mac

https://support.apple.com/en-au/guide/mac-help/mh26785/11.0/mac/11.0

If your Mac doesn't start up all the way

https://support.apple.com/en-au/HT204156

If your Mac doesn’t start up as expected:

https://support.apple.com/en-au/guide/mac-help/mchlp2889/11.0/mac/11.0

Hope this helps you :-)

Or ... if you still need help:

Apple phone numbers around the world

Contact Apple for support and service:

https://support.apple.com/en-us/HT201232

If your country is not listed: 

Apple Assistance:

Choose your country or region:

https://support.apple.com/choose-country-region

OR

There is a "Get Support" link to Apple at top right on this discussion page.

All the best.