Something else must have happened as well. What have you tried?
Try to follow the instructions at How to reinstall macOS - Apple Support.
Perhaps the SSD has died.
Apple’s Worldwide Developers Conference to kick off June 10 at 10 a.m. PDT with Keynote address
The Keynote will be available to stream on apple.com, the Apple Developer app, the Apple TV app, and the Apple YouTube channel. On-demand playback will be available after the conclusion of the stream.
The Keynote will be available to stream on apple.com, the Apple Developer app, the Apple TV app, and the Apple YouTube channel. On-demand playback will be available after the conclusion of the stream.
Something else must have happened as well. What have you tried?
Try to follow the instructions at How to reinstall macOS - Apple Support.
Perhaps the SSD has died.
NEVER MIND!
I fixed this by:
1. Holding the alt key during startup
2. Entering the PIN (set during initial locking) when the lock symbol shows up
3. Pressing Enter
4. Choosing Macintosh HD
5. Entering the PIN when prompted (yes, again)
🙂 (the alt key is usually called the option key). Seems more symptomatic of having a firmware password enabled.
Find My Mac BRICKED my MacBook Air