Macbook Pro Has A Lock On The Screen

My MacBook Pro have a lock icon on my screen and I have just reset it. Technician's Assistant: What Operating System (OS) are you running on your MacBook? When I first boot up. I've looked up if there's anything I can do but everyone says to take the MacBook to Apple. But I would need proof of ownership of the MacBook. We had 300 Macbook Pro in late 2018 those were from two tech companies. The system admins disowned the devices before they get rid of them but when we format the drives and reinstall the OS, the device enrolment management screen popped up. Since the software update was completed, we just turned the device off and disable the notification manually.

1. Macbook Screen Lock Settings
2. Macbook Pro Has A Lock On The Screen Capture
3. Macbook Pro Has A Lock On The Screen Mirroring

How to turn on a firmware password

• Open your image of choice using Preview — if that isn't your default viewer, simply right-click the image and select. Rename the image as 'lockscreen.png' by double clicking the name at the top of the Preview window. Open the Finder in the dock at the bottom of your screen.
• If you're 2012 macbook pro a1278 is having flashing blinking folder with question mark, turning off randomly, computer freeze randomly, or white screen of de.

1. Start up from macOS Recovery.
2. When the utilities window appears, click Utilities in the menu bar, then choose Startup Security Utility or Firmware Password Utility.
3. Click Turn On Firmware Password.
4. Enter a firmware password in the fields provided, then click Set Password. Remember this password.
5. Quit the utility, then choose Apple menu  > Restart.

Macbook Screen Lock Settings

Macbook Pro Has A Lock On The Screen Capture

Your Mac asks for the firmware password only when attempting to start up from a storage device other than the one selected in Startup Disk preferences, or when starting up from macOS Recovery. Enter the firmware password when you see the lock and password field:

How to turn off a firmware password

1. Start up from macOS Recovery. During startup, you will be prompted to enter the firmware password.
2. When the utilities window appears, click Utilities in the menu bar, then choose Startup Security Utility or Firmware Password Utility.
   
3. Click Turn Off Firmware Password.
4. Enter the firmware password again when prompted.
5. Quit the utility, then choose Apple menu  > Restart.

If you forgot your firmware password

Macbook Pro Has A Lock On The Screen Mirroring

Macbook pro disk space management. 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. Apple operating system definition.