Seller: macbiosunlock ✉️ (177) 100%, Location: California, US, Ships to: US & many other countries, Item: 392275245688 Bios EFI Firmware Chip for Apple iMac 21.5" 4K Late 2015 A1418 EMC 2833. EFI Firmware Chip for Apple iMac 4K 21.5" A1418 Late 2015 EMC 2833. Order MK452LL/A Model A1418 (EMC 2833). Order BTO/CTO Model A1418 (EMC 2833). Mac Bios Unlock. October 13, 2015 Disc. June 5, 2017. Mac Bios Unlock EFI Firmware Chip for Apple iMac 4K 21.5" A1418 Late 2015 EMC 2833 DESCRIPTION NEW Pre-Programmed Bios EFI Firmware Chip for Apple iMac 21.5" 4K Late 2015 A1418 i5 or i7 EMC 2833 Fix Corrupted Firmware caused during updates Remove the EFI iCloud Password Lock. (4 pin, 6 pin) Disabled Mac, Locked Mac Remove MDM (Remote Management), DEP (Do not use your original S/N if your Mac has MDM) Supported Models: Note: Wrong model will NOT work iMac 21.5-Inch "Core i5" 3.1 (4K, Late 2015) 3.1 GHz Core i5 (I5-5675R) Intro. October 13, 2015 Disc. June 5, 2017 Order MK452LL/A Model A1418 (EMC 2833) Family Retina 4K, Late 2015 ID iMac16,2 iMac 21.5-Inch "Core i7" 3.3 (4K, Late 2015) 3.3 GHz Core i7 (I7-5775R) Intro. October 13, 2015 Disc. June 5, 2017 Order BTO/CTO Model A1418 (EMC 2833) Family Retina 4K, Late 2015 ID iMac16,2 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. Add your serial number at checkout if you like to keep your original serial number or just message me. 100% Permanent and working chip with Clean ME Region You can find the EMC number by visiting this website everymac "dot" com / ultimate-mac-lookup 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 your orders within 24 hours via USPS First Class. (Free) 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: BIOS chip