iMac 24-inch (M1, Two Ports, 2021)

iMac 24-inch (M1, Two Ports, 2021) firmware

iMac21,1 J456AP t8103 72 versions

Latest: macOS 27.0.1 (26A434), released Sep 28, 2026.

Signed right now

Apple is currently signing these versions, so you can install them with Finder or iTunes.

macOS 27.0.1 26A434 · 24.81 GB macOS 27.0 26A428 · 24.80 GB macOS 26.6.2 25G83 · 18.41 GB macOS 26.6.1 25G76 · 18.41 GB macOS 26.6 25G72 · 18.41 GB macOS 26.5.2 25F84 · 18.41 GB macOS 26.5.1 25F80 · 18.41 GB macOS 26.5 25F71 · 18.41 GB macOS 26.4.1 25E253 · 18.38 GB macOS 26.4 25E246 · 18.38 GB macOS 26.3.1 25D2128 · 18.00 GB macOS 26.3 25D125 · 17.58 GB macOS 26.2 25C56 · 17.45 GB macOS 26.1 25B78 · 17.43 GB macOS 26.0.1 25A362 · 17.01 GB macOS 26.0 25A354 · 17.01 GB macOS 15.6.1 24G90 · 15.66 GB macOS 15.6 24G84 · 15.66 GB macOS 15.5 24F74 · 15.72 GB macOS 15.4.1 24E263 · 15.65 GB macOS 15.4 24E248 · 15.65 GB macOS 15.3.2 24D81 · 15.40 GB macOS 15.3.1 24D70 · 15.40 GB macOS 15.3 24D60 · 15.40 GB macOS 15.2 24C101 · 15.40 GB macOS 15.1.1 24B91 · 14.67 GB macOS 15.1 24B83 · 14.66 GB macOS 15.0.1 24A348 · 14.66 GB macOS 15.0 24A335 · 14.66 GB macOS 14.6.1 23G93 · 13.77 GB macOS 14.6 23G80 · 13.77 GB macOS 14.5 23F79 · 13.78 GB macOS 14.4.1 23E224 · 13.73 GB macOS 14.4 23E214 · 13.73 GB macOS 14.3.1 23D60 · 13.51 GB macOS 14.3 23D56 · 13.51 GB macOS 14.2.1 23C71 · 13.49 GB macOS 14.2 23C64 · 13.49 GB macOS 14.1.2 23B92 · 13.02 GB macOS 14.1.1 23B81 · 13.02 GB macOS 14.1 23B74 · 13.02 GB macOS 14.0 23A344 · 12.95 GB macOS 13.6 22G120 · 12.01 GB macOS 13.5.2 22G91 · 12.01 GB macOS 13.5.1 22G90 · 12.01 GB macOS 13.5 22G74 · 12.01 GB macOS 13.4.1 22F82 · 11.86 GB macOS 13.4 22F66 · 11.87 GB macOS 13.3.1 22E261 · 11.85 GB macOS 13.3 22E252 · 11.85 GB macOS 13.2.1 22D68 · 11.64 GB macOS 13.2 22D49 · 11.64 GB macOS 13.1 22C65 · 11.44 GB macOS 13.0.1 22A400 · 11.36 GB macOS 13.0 22A380 · 11.36 GB macOS 12.6 21G115 · 13.11 GB macOS 12.5.1 21G83 · 13.12 GB macOS 12.5 21G72 · 13.12 GB macOS 12.4 21F79 · 12.89 GB macOS 12.3.1 21E258 · 12.92 GB macOS 12.3 21E230 · 12.92 GB macOS 12.2.1 21D62 · 13.17 GB macOS 12.2 21D49 · 13.17 GB macOS 12.1 21C52 · 13.17 GB macOS 12.0.1 21A559 · 13.13 GB macOS 11.6 20G165 · 13.00 GB macOS 11.5.2 20G95 · 13.01 GB macOS 11.5.1 20G80 · 13.01 GB macOS 11.5 20G71 · 13.01 GB macOS 11.4 20F71 · 12.97 GB macOS 11.3.1 20E241 · 12.98 GB macOS 11.3 20E232 · 12.99 GB
VersionBuildReleasedSizeStatusJailbreakDownload
macOS 27.0.1 Latest 26A434 Sep 28, 2026 24.81 GB Signed —
macOS 27.0 26A428 Sep 14, 2026 24.80 GB Signed —
macOS 26.6.2 25G83 Aug 17, 2026 18.41 GB Signed —
macOS 26.6.1 25G76 Aug 6, 2026 18.41 GB Signed —
macOS 26.6 25G72 Jul 27, 2026 18.41 GB Signed —
macOS 26.5.2 25F84 Jun 29, 2026 18.41 GB Signed —
macOS 26.5.1 25F80 Jun 1, 2026 18.41 GB Signed —
macOS 26.5 25F71 May 11, 2026 18.41 GB Signed —
macOS 26.4.1 25E253 Apr 9, 2026 18.38 GB Signed —
macOS 26.4 25E246 Mar 24, 2026 18.38 GB Signed —
macOS 26.3.1 25D2128 Mar 4, 2026 18.00 GB Signed —
macOS 26.3 25D125 Feb 11, 2026 17.58 GB Signed —
macOS 26.2 25C56 Dec 12, 2025 17.45 GB Signed —
macOS 26.1 25B78 Nov 3, 2025 17.43 GB Signed —
macOS 26.0.1 25A362 Sep 29, 2025 17.01 GB Signed —
macOS 26.0 25A354 Sep 15, 2025 17.01 GB Signed —
macOS 15.6.1 24G90 Aug 20, 2025 15.66 GB Signed —
macOS 15.6 24G84 Jul 29, 2025 15.66 GB Signed —
macOS 15.5 24F74 May 12, 2025 15.72 GB Signed —
macOS 15.4.1 24E263 Apr 16, 2025 15.65 GB Signed —
macOS 15.4 24E248 Mar 31, 2025 15.65 GB Signed —
macOS 15.3.2 24D81 Mar 11, 2025 15.40 GB Signed —
macOS 15.3.1 24D70 Feb 10, 2025 15.40 GB Signed —
macOS 15.3 24D60 Jan 27, 2025 15.40 GB Signed —
macOS 15.2 24C101 Dec 11, 2024 15.40 GB Signed —
macOS 15.1.1 24B91 Nov 19, 2024 14.67 GB Signed —
macOS 15.1 24B83 Oct 28, 2024 14.66 GB Signed —
macOS 15.0.1 24A348 Oct 3, 2024 14.66 GB Signed —
macOS 15.0 24A335 Sep 16, 2024 14.66 GB Signed —
macOS 14.6.1 23G93 Aug 7, 2024 13.77 GB Signed —
macOS 14.6 23G80 Jul 29, 2024 13.77 GB Signed —
macOS 14.5 23F79 May 13, 2024 13.78 GB Signed —
macOS 14.4.1 23E224 Mar 25, 2024 13.73 GB Signed —
macOS 14.4 23E214 Mar 7, 2024 13.73 GB Signed —
macOS 14.3.1 23D60 Feb 8, 2024 13.51 GB Signed —
macOS 14.3 23D56 Jan 22, 2024 13.51 GB Signed —
macOS 14.2.1 23C71 Dec 19, 2023 13.49 GB Signed —
macOS 14.2 23C64 Dec 11, 2023 13.49 GB Signed —
macOS 14.1.2 23B92 Nov 30, 2023 13.02 GB Signed —
macOS 14.1.1 23B81 Nov 7, 2023 13.02 GB Signed —
macOS 14.1 23B74 Oct 25, 2023 13.02 GB Signed —
macOS 14.0 23A344 Sep 26, 2023 12.95 GB Signed —
macOS 13.6 22G120 Sep 21, 2023 12.01 GB Signed —
macOS 13.5.2 22G91 Sep 7, 2023 12.01 GB Signed —
macOS 13.5.1 22G90 Aug 17, 2023 12.01 GB Signed —
macOS 13.5 22G74 Jul 24, 2023 12.01 GB Signed —
macOS 13.4.1 22F82 Jun 21, 2023 11.86 GB Signed —
macOS 13.4 22F66 May 18, 2023 11.87 GB Signed —
macOS 13.3.1 22E261 Apr 7, 2023 11.85 GB Signed —
macOS 13.3 22E252 Mar 27, 2023 11.85 GB Signed —
macOS 13.2.1 22D68 Feb 13, 2023 11.64 GB Signed —
macOS 13.2 22D49 Jan 23, 2023 11.64 GB Signed —
macOS 13.1 22C65 Dec 13, 2022 11.44 GB Signed —
macOS 13.0.1 22A400 Nov 9, 2022 11.36 GB Signed —
macOS 13.0 22A380 Oct 24, 2022 11.36 GB Signed —
macOS 12.6 21G115 Sep 12, 2022 13.11 GB Signed —
macOS 12.5.1 21G83 Aug 17, 2022 13.12 GB Signed —
macOS 12.5 21G72 Jul 20, 2022 13.12 GB Signed —
macOS 12.4 21F79 May 16, 2022 12.89 GB Signed —
macOS 12.3.1 21E258 Mar 31, 2022 12.92 GB Signed —
macOS 12.3 21E230 Mar 14, 2022 12.92 GB Signed —
macOS 12.2.1 21D62 Feb 10, 2022 13.17 GB Signed —
macOS 12.2 21D49 Jan 26, 2022 13.17 GB Signed —
macOS 12.1 21C52 Dec 13, 2021 13.17 GB Signed —
macOS 12.0.1 21A559 Nov 4, 2021 13.13 GB Signed —
macOS 11.6 20G165 Sep 17, 2021 13.00 GB Signed —
macOS 11.5.2 20G95 Aug 11, 2021 13.01 GB Signed —
macOS 11.5.1 20G80 Jul 26, 2021 13.01 GB Signed —
macOS 11.5 20G71 Jul 21, 2021 13.01 GB Signed —
macOS 11.4 20F71 May 24, 2021 12.97 GB Signed —
macOS 11.3.1 20E241 May 3, 2021 12.98 GB Signed —
macOS 11.3 20E232 Apr 26, 2021 12.99 GB Signed —

About iMac 24-inch (M1, Two Ports, 2021) firmware

The iMac 24-inch (M1, Two Ports, 2021) (model identifier iMac21,1, board J456AP) has 72 macOS restore images on record, from macOS 11.3 to macOS 27.0.1. You can currently install macOS 27.0.1, macOS 27.0, macOS 26.6.2, macOS 26.6.1, macOS 26.6, macOS 26.5.2, macOS 26.5.1, macOS 26.5, macOS 26.4.1, macOS 26.4, macOS 26.3.1, macOS 26.3, macOS 26.2, macOS 26.1, macOS 26.0.1, macOS 26.0, macOS 15.6.1, macOS 15.6, macOS 15.5, macOS 15.4.1, macOS 15.4, macOS 15.3.2, macOS 15.3.1, macOS 15.3, macOS 15.2, macOS 15.1.1, macOS 15.1, macOS 15.0.1, macOS 15.0, macOS 14.6.1, macOS 14.6, macOS 14.5, macOS 14.4.1, macOS 14.4, macOS 14.3.1, macOS 14.3, macOS 14.2.1, macOS 14.2, macOS 14.1.2, macOS 14.1.1, macOS 14.1, macOS 14.0, macOS 13.6, macOS 13.5.2, macOS 13.5.1, macOS 13.5, macOS 13.4.1, macOS 13.4, macOS 13.3.1, macOS 13.3, macOS 13.2.1, macOS 13.2, macOS 13.1, macOS 13.0.1, macOS 13.0, macOS 12.6, macOS 12.5.1, macOS 12.5, macOS 12.4, macOS 12.3.1, macOS 12.3, macOS 12.2.1, macOS 12.2, macOS 12.1, macOS 12.0.1, macOS 11.6, macOS 11.5.2, macOS 11.5.1, macOS 11.5, macOS 11.4, macOS 11.3.1, macOS 11.3.

IPSW files are the complete operating system packages Apple uses to restore devices. Download one when your device is stuck in recovery mode, when an over-the-air update fails, or to install a clean copy of macOS. See how to restore with an IPSW.