crwdns2890332:0Mother Board locked? How to unlockcrwdne2890332:0Most of the new Mac machines are capable to lock you out for getting into Recovery or Boot from USB. The only way I found that you can restore and wipe your Mac with a tool available at Mac app store called Configurator 2. Put your Mac into DFU mode and restore it! If machine is linked with the previous owner’s iCloud you’ll still be required to have to pass activation lock!