Seller: macbiosunlock ✉️ (180) 100%, Location: California, US, Ships to: US & many other countries, Item: 394509984652 Bios EFI Firmware Chip for Apple iMac 21.5" Late 2011 A1311 EMC 820-2641. Mac Bios Unlock. Fix Corrupted Firmware caused during updates. Solve and Unlock EFI iCloud PasswordLock. (4 pin, 6 pin). Chip is ready to use. For professionals. You will need to use soldering tools to remove your old chip and solder the new one. Mac Bios Unlock EFI Firmware Chip for Apple iMac 21.5" Late 2011 A1311 820-2641 DESCRIPTION NEW Pre-Programmed Bios EFI Firmware Chip for iMac 21.5" Late 2011 A1311 Logic board: 820-2641 Chip is ready to use Fix Corrupted Firmware caused during updates Solve and Unlock EFI iCloud PasswordLock. (4 pin, 6 pin) Disabled Mac Bypass MDM (Remote Management), DEP Profile Please note this chip will not remove the Operating System password or Hard Drive password. It is highly recommended to format and reinstall a clean version of MacOS after installing the new chip. For professionals. You will need to use soldering tools to remove your old chip and solder the new one. The chip will come with a random serial number (clean) or we can program your original S/N into the chip. Note: Do not use your original S/N if your Mac has MDM or DEP 100% Permanent and working chip with Clean ME Region Please contact me if you need help or have any questions RETURN POLICY 30 days return or exchange if there is any problem with the chip. Please contact me before opening case. I will be happy to help you. SHIPPING We will ship the chip within 24 hours via USPS First Class. (Free) Priority Mail: $5 FEEDBACK Please take a moment and leave us a positive feedback. If there is a problem with your order please contact me before leaving negative feedback. 😊 Condition: New, Brand: Macronix MXIC (original), Compatible Brand: For Apple, Type: EFI chip