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- 820-2883-A
EFI firmware archive for Apple logic board 820-2883, with the suffix A, probably denoting the board revision. This number belongs to the 13-inch MacBook A1342.
BIOS · 820-2883 · 1.55 MB · 3 Sept 2020BIOS rar1.55 MB - E6440A13 8M
8 MB part of a BIOS set labelled E6440A13, pointing to version A13 for an E6440 board, with a matching 4 MB file in the same set.
BIOS · 8.00 MB · 7 May 2025BIOS bin—8.00 MB - BIOS 820-2993-A HM65 MX25L6405
BIOS dump for Apple logic board 820-2993 revision A, the Mac mini A1347 board, noting the HM65 chipset and a Macronix MX25L6405 flash chip.
BIOS · 820-2993 · 3.76 MB · 5 Dec 2023BIOS rar3.76 MB - MBA4,2 BIOS v0077 B12
Apple MacBook Air 4,2 boot ROM, version 0077 B12, for logic board 820-3023. Apple numbers its logic boards 820-xxxx, with a suffix letter for the revision.
BIOS · 820-3023 · 3.73 MB · 30 Jan 2019BIOS zip3.73 MB