MacBook locked when starting.
Black screen on start with lock . Probably asking firmware password.
MacBook Air 13″, macOS 11.7
Question marked as
Yeah it is asking for a firmware password. If you ‘ve forgotten it please follow these instructions
If you can't remember your firmware password, schedule an in-person service appointment with an Apple Store or Apple Authorized Service Provider. Bring your Mac to the appointment, and bring your original receipt or invoice as proof of purchase.3