820-6478 is a Apple motherboard used in Apple devices. Enginerys has 4 BIOS dumps for this board, collected from public Telegram channels.
Check that 820-6478 matches the number printed on your PCB, including the revision. Where to find it →
820-6478 BIOS dumps
- iMac A1419 EMC 2639 820 6478 A CLEAN telegram BIOS Repair 2025 09BIOS · 820-6478 · 4.42 MB · 23 Sept 2025BIOS zip4.42 MB
- iMac A1419-EMC 2639-820-6478-A CLEAN-SRGinfotechBIOS · 820-6478 · 8.00 MB · 7 May 2025BIOS bin8.00 MB
- iMac A1419-EMC 2639-820-6478-A CLEAN (Luirons Bios)BIOS · 820-6478 · 3.96 MB · 22 Feb 2021BIOS rar3.96 MB
- iMac A1419-EMC 2639-820-6478-A CLEAN
Clean EFI firmware dump for the Apple iMac A1419, EMC 2639, logic board 820-6478-A. Clean usually means the dump has had its machine-specific data such as serial number…
BIOS · 820-6478 · 3.95 MB · 2 Dec 2018BIOS rar3.95 MB
Questions about 820-6478
Is there a schematic for 820-6478?
No standalone schematic PDF has been indexed for 820-6478 yet. Check the archives listed on this page — schematics are often packed together with the boardview — or search again later, as the index is updated daily.
Is there a boardview for 820-6478?
No boardview has been indexed for 820-6478 yet.
Who makes the 820-6478 board?
820-6478 follows the Apple numbering scheme (820-xxxxx). It is found in Apple devices.