A lock icon indicates a firmware password is set on your Mac. You might see the lock icon at startup if you try to start your Mac from another volume like an external drive or macOS Recovery. Enter your firmware password to continue starting up.
If you didn't set a firmware password yourself, it might be set remotely by someone who gained access to your Apple ID account. In that case, or when you simply forgot your passcode, schedule a service appointment with an Apple Store or Apple Authorized Service Provider. Bring your original receipt or invoice as proof of purchase.
A lock icon indicates a firmware password is set on your Mac. You might see the lock icon at startup if you try to start your Mac from another volume like an external drive or macOS Recovery. Enter your firmware password to continue starting up.
If you didn't set a firmware password yourself, it might be set remotely by someone who gained access to your Apple ID account. In that case, or when you simply forgot your passcode, schedule a service appointment with an Apple Store or Apple Authorized Service Provider. Bring your original receipt or invoice as proof of purchase.
Lock icon with password box, and I don't remember the password.
