Blinking file with question mark
2015 MacBook Air. When I put it on it shows a blinking file with question mark. Then I push command R and it'll show a padlock for a passcode I forgot it. What do I do
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Hi there -
If you see a lock icon, this indicates that your Mac is using a firmware password. 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.
To learn more, see: Set a firmware password on your Mac - Apple Support.
-Jack