I accidentally locked my MacBook while trying to hide its location
How do I unlock my MacBook? I wanted to hide the location from Find My Iphone
MacBook Air 13", macOS 10.14
Please explain more clearly what you did and what happened. Sounds like you may have put your MacBook into Lost Mode using Find My iPhone. If that is the case, see this for getting back into the MacBook. Use Lost Mode in Find My iPhone on iCloud.com - Apple Support It is near the bottom of the page.