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For Intel-based Macs with a T2 Security Chip (roughly 2018–2020), third-party software can sometimes bypass the lock by putting the device into .

Some manufacturers have internal backdoor passwords (e.g., for Dell, a password generated from the service tag using a specific algorithm). These are not meant for public use but can be found in service manuals. Again, these should only be used on your own property. unlock efi password top

For modern Macs (M1/M2/M3 chips or Intel Macs with the T2 security chip), the process has changed. You cannot bypass these by swapping RAM or using older software exploits. Connect the locked Mac to another Mac using a USB-C cable. Launch on the working Mac. Put the locked Mac into DFU Mode . For Intel-based Macs with a T2 Security Chip