basic system OSX locked disk.  How can I unlock it so I can reinstall osx el capitan?

I'm selling my macbook air and remove my drive of macintosh hd.  I am unable to re install El Capitan because the basic system osx disk is locked.  How to unlock it.  My system only reboots in disk utility mode.  Help!

Hi ruby3918,

Welcome to Apple Support communities.

Looks like you are unable to reinstall OS X El Capitan on your MacBook Air because the laptop displays a lock icon with a field of password that you are not able to go beyond. The article below provides much information about the firmware passwords and it should help you to solve the problem of password on your MacBook Air.

Use a password of the firmware on your Mac - Apple Support

See you soon.

Tags: Notebooks

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