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- Apple Apple K23F 051 8233 G 820 2733 A iMac 27″ A1312 biosBIOS · 820-2733 · 5.52 MB · 23 Feb 2026BIOS rar5.52 MB
- imac 27 mid10Schematic · 40.5 MB · 12 Jul 2019Schematic pdf—40.5 MB
- imac 27 late09Schematic · 33.9 MB · 12 Jul 2019Schematic pdf—33.9 MB
- iMac 27 A1419 - 820-3299 EMC2546 BRDBoardview · 820-3299 · 163 KB · 15 Dec 2024Boardview rar163 KB
- iMac 27 A1419 - 820-3299 EMC2546 PDFSchematic · 820-3299 · 2.25 MB · 15 Dec 2024Schematic rar2.25 MB
- 820-2828 iMac 27, Mid 2011, model A1312Schematic · 820-2828 · 1.99 MB · 9 May 2025Schematic pdf1.99 MB
- iMac 27 A1419 - 820-3299 EMC2546 BOARDVIEW(BDV)PKBoardview · 820-3299 · 163 KB · 7 Sept 2026Boardview rar163 KB
- IMACK 27 A1312 820 2828 A MX25L6406E WORKING BIOS 100% telegramBIOS · 820-2828 · 3.62 MB · 23 Sept 2025BIOS zip3.62 MB
- MACK iMac 27 A1419 MK 482 820-00134 820-01134-A PDFSchematic · 820-00134 · 1.73 MB · 15 Dec 2024Schematic rar1.73 MB
- Apple iMac 27 A1419
Archive for the Apple iMac 27-inch, model A1419, in a 2.25 MB RAR. The name gives no board number, year or file type, so open it to see whether it contains a schematic…
Archive · 2.25 MB · 3 Aug 2020Archive rar—2.25 MB - APPLE IMAC 27 A2115 820-01779-A SCHEMATIC & BOARDVIEW
Combined schematic and boardview package for the Apple iMac 27 model A2115, logic board 820-01779-A.
Boardview · 820-01779 · 3.38 MB · 3 Jul 2025Boardview rar3.38 MB - Apple iMac A1311 K74 051-8337 820-2784 PDF
Schematic in PDF form for the Apple iMac A1311, project K74, logic board 820-2784 with document number 051-8337, supplied in a 2.80 MB RAR archive.
Schematic · 820-2784 · 2.80 MB · 5 Sept 2023Schematic rar2.80 MB - Apple iMac 27 Late 2013 (820-3481-A)
Firmware image for the Apple iMac 27 inch Late 2013, logic board 820-3481-A, where A is the revision suffix in Apple 820 numbering.
BIOS · 820-3481 · 8.00 MB · 23 Oct 2021BIOS bin8.00 MB - apple-imac-27-a1312-sch-k23-mlb-schematics
Logic board schematic for the Apple iMac 27-inch, model A1312, with K23 being Apple's internal code for this main logic board (MLB).
Schematic · 1.59 MB · 25 Dec 2017Schematic pdf—1.59 MB - Apple IMac 27 A1312 SCH K23 MLB Schematics AMD 109 B97157 00
Apple schematic for the iMac 27-inch A1312, K23 logic board (MLB), for the version with AMD graphics, document number 109-B97157-00. The RAR archive is 1.46 MB.
Schematic · 1.46 MB · 11 Jul 2022Schematic rar—1.46 MB - Apple iMac 27 5K Retina 820-00609-A
Boot ROM firmware for the Apple iMac 27-inch 5K Retina on logic board 820-00609-A, stored as a 4.25 MB RAR.
BIOS · 820-00609 · 4.25 MB · 20 Jun 2020BIOS rar4.25 MB - BIOS Apple iMac 27 Late 2013 (820-3481-A)
BIOS image for the Apple iMac 27-inch Late 2013, logic board 820-3481-A, compressed in a 7.80 MB RAR.
BIOS · 820-3481 · 7.80 MB · 28 Mar 2022BIOS rar7.80 MB - Apple iMac 27 Late 2013 A1237 820-2179-C
EFI firmware dump labelled for an Apple iMac 27 inch Late 2013, A1237, with logic board 820-2179-C, revision C.
BIOS · 820-2179 · 4.00 MB · 23 Oct 2021BIOS bin4.00 MB - Apple iMac 27 A1419 MK482 820-00134 PDF
Schematic in PDF form for the Apple iMac 27-inch, model A1419, order number MK482, built on logic board 820-00134, inside a 1.78 MB rar archive.
Schematic · 820-00134 · 1.78 MB · 5 Mar 2022Schematic rar1.78 MB - apple-imac-27-a1312-sch-k23-mlb-schematics
Main logic board schematic for the Apple iMac 27-inch, model A1312, identified in the name by the K23 project code and MLB designation.
Schematic · 1.59 MB · 26 Dec 2017Schematic pdf—1.59 MB - Apple iMac 27 A1419 D8 MLB 051-9504 Rev 7.0.0
Main logic board (MLB) schematic archive for the Apple iMac 27-inch A1419, project D8, document 051-9504 at revision 7.0.0.
Archive · 2.44 MB · 5 Jul 2019Archive rar—2.44 MB - Apple iMac 27 A1419 D8 MLB ULTIMATE 051-9505 Rev 8.0.0
Apple iMac 27-inch A1419 logic board documentation for project D8, labeled MLB ULTIMATE, document 051-9505 at revision 8.0.0.
Archive · 2.25 MB · 5 Jul 2019Archive rar—2.25 MB - Apple iMac 27 Late 2013 (820-3481-A) Clear me
Cleaned EFI firmware for the Apple iMac 27 inch Late 2013 on logic board 820-3481-A, the Clear me note implying the image was prepared without the original machine data.
BIOS · 820-3481 · 8.00 MB · 21 Jul 2020BIOS bin8.00 MB - apple iMac 27 A1312 820-2828-A MX25L6406E TESTED OK
Firmware dump for the Apple iMac 27-inch A1312, logic board 820-2828-A, read from an MX25L6406E SPI flash chip and marked as tested OK, supplied as a 3.53 MB ZIP…
BIOS · 820-2828 · 3.53 MB · 5 Sept 2023BIOS zip3.53 MB - Apple iMac 27 5K Retina 820-00609-A
Firmware dump for the Apple iMac 27-inch 5K Retina logic board 820-00609-A, packaged as a 4.29 MB RAR.
BIOS · 820-00609 · 4.29 MB · 25 May 2022BIOS rar4.29 MB - Apple iMac 27 A1419 J17 PVT 820 3478 A – Boardview brd brd
Boardview for the Apple iMac 27-inch A1419, project J17, PVT build, logic board 820-3478 revision A, delivered as a 148 KB zip with a .brd file inside.
Boardview · 820-3478 · 148 KB · 18 Jul 2020Boardview zip148 KB - iMac 27 A1419 - 820-3299 EMC2546 PDF
Schematic for the iMac 27 inch A1419, EMC 2546, built on Apple logic board 820-3299, provided as PDF in a 2.29 MB RAR archive.
Schematic · 820-3299 · 2.29 MB · 1 Oct 2023Schematic rar2.29 MB - IMACK 27 A1312 820-2828-A MX25L6406E WORKING BIOS 100%
Working BIOS for the Apple iMac 27-inch A1312 with logic board 820-2828-A, dumped from an MX25L6406E chip. That Macronix 64 Mbit (8 MB) SPI flash stores the boot ROM.
BIOS · 820-2828 · 3.35 MB · 5 Jun 2023BIOS rar3.35 MB - MACK iMac27A1419MK482 820-00134 820-01134-ASchematic · 820-00134 · 1.77 MB · 23 Dec 2023Schematic pdf1.77 MB
- iMac 27 A1419 - 820-3299 EMC2546 BRD
Boardview for the iMac 27 inch model A1419, EMC 2546, logic board 820-3299, supplied in BRD format inside a 209 KB RAR archive.
Boardview · 820-3299 · 209 KB · 1 Oct 2023Boardview rar209 KB - iMac Retina 5K A2115 2019 27 - 820-01236 - 051-032
Boardview for the 2019 27-inch iMac Retina 5K, model A2115, logic board 820-01236, packed as a 447 KB ZIP.
Boardview · 820-01236 · 447 KB · 27 Feb 2025Boardview zip447 KB - MACK iMac 27 A1419 MK 482 820-00134 820-01134-A PDF
Schematic in PDF for the iMac 27 inch A1419, project MK 482, covering logic boards 820-00134 and 820-01134-A, packed as a RAR of around 1.78 MB.
Schematic · 820-00134 · 1.78 MB · 23 Dec 2023Schematic rar1.78 MB - 820-3481-ABIOS · 820-3481 · 8.00 MB · 4 Jan 2024BIOS bin8.00 MB
- APPLE iMac 21.5 A1418 820-01061-A
Firmware archive for the Apple iMac 21.5 inch, model A1418, logic board 820-01061-A, packed as 4.27 MB RAR.
BIOS · 820-01061 · 4.27 MB · 5 Jul 2021BIOS rar4.27 MB - Apple iMac A1419 820-4652-A bios
BIOS firmware for the Apple iMac A1419, the 27-inch model, on logic board 820-4652-A. The ZIP archive holds an EFI ROM image for rewriting the SPI flash on the logic…
BIOS · 820-4652 · 4.62 MB · 9 Jun 2021BIOS zip4.62 MB - 820-3299Schematic · 820-3299 · 2.29 MB · 26 Sept 2025Schematic pdf2.29 MB
- 820-3299Schematic · 820-3299 · 2.29 MB · 1 Oct 2023Schematic pdf2.29 MB
- BIOS Apple MacBook A1312 820-2733-A
Firmware for the Apple MacBook A1312 logic board 820-2733 revision A, provided as a 1.61 MB RAR.
BIOS · 820-2733 · 1.61 MB · 3 Apr 2020BIOS rar1.61 MB - IMAC a1419 EMC3070 820-01134-A
Boot ROM firmware for an Apple iMac model A1419, EMC 3070, with logic board 820-01134-A, contained in a 4.28 MB RAR.
BIOS · 820-01134 · 4.28 MB · 25 May 2022BIOS rar4.28 MB - A1311 K74 MLB 820-2784-A - Boardview
Boardview for the Apple A1311 iMac logic board, project code K74, board number 820-2784-A, revision A.
Boardview · 820-2784 · 106 KB · 12 Dec 2020Boardview zip106 KB