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

macOS 27.2 (26B123) for iMac 24-inch (M1, Two Ports, 2021)

Signed — can be installed Released Oct 26, 2026 iMac21,1

Download IPSW

UniversalMac_27.2_26B123_Restore.ipsw

23.84 GB
Download macOS 27.2

The file is downloaded directly from Apple’s servers (updates.cdn-apple.com). Large files download faster with a download manager or curl -O.

Verify the file

SHA256
6613b34e8589db2202a01ec37a2648afb141ece13428175183f8f3e38438534f
SHA1
617360e5619dbb424ed3774b98732bb3cfeacc0b
MD5
819227d6e82c48faf880125c52ea4f95

On a Mac: shasum -a 256 UniversalMac_27.2_26B123_Restore.ipsw · On Windows: certutil -hashfile UniversalMac_27.2_26B123_Restore.ipsw SHA256

Firmware details

Version
macOS 27.2
Build
26B123
Released
October 26, 2026
Uploaded
October 23, 2026
File size
23.84 GB (25,595,669,503 bytes)
Signing
Signed

Device

Identifier
iMac21,1
Board
J456AP
Platform
t8103
CPID
0x8103
BDID
0x28

How to install macOS 27.2 with this IPSW

  1. Back up your iMac 24-inch (M1, Two Ports, 2021) to iCloud or your computer — restoring erases the device.
  2. Turn off Find My in Settings → [your name] → Find My.
  3. Connect the device with a cable and open Finder (macOS Catalina or later) or Apple Devices / iTunes (Windows).
  4. Hold Option (Mac) or Shift (Windows) and click Restore. Choose UniversalMac_27.2_26B123_Restore.ipsw.
  5. Wait — the device restarts several times. Don’t disconnect it until you see the Hello screen.

Stuck on the Apple logo? Put the device into recovery mode first, then restore.

Build 26B123 is also available for

Mac mini (M6) Mac Studio (M5 Max) Mac Studio (M5 Ultra) Mac mini (M5 Pro) MacBook Pro (16-inch, M5 Pro) MacBook Pro (14-inch, M5 Pro) MacBook Air (15-inch, M5) MacBook Pro (16-inch, M5 Max) MacBook Air (13-inch, M5) MacBook Pro (14-inch, M5 Max) MacBook Neo MacBook Pro (14-inch, M5) Mac Studio (2025) MacBook Air (13-inch, M4, 2025) MacBook Air (15-inch, M4, 2025) Mac Studio (2025) MacBook Pro (M4 Pro, 14-inch, Nov 2024) iMac (Two Ports, 24-inch, 2024) MacBook Pro (M4 Pro, 16-inch, Nov 2024) Mac mini (M4 Pro, 2024) iMac (Four Ports, 24-inch, 2024) MacBook Pro (M4 Max, 16-inch, Nov 2024) MacBook Pro (M4, 14-inch, Nov 2024) MacBook Pro (M4 Max, 14-inch, Nov 2024) Mac mini (M4, 2024) MacBook Air (13-inch, M3, 2024) MacBook Air (15-inch, M3, 2024) MacBook Pro (M3 Pro, 16-inch, Nov 2023) MacBook Pro (M3 Max, 14-inch, Nov 2023) MacBook Pro (M3 Max, 14-inch, Nov 2023) MacBook Pro (M3, 14-inch, Nov 2023) MacBook Pro (M3 Max, 16-inch, Nov 2023) MacBook Pro (M3 Pro, 14-inch, Nov 2023) iMac (Four Ports, 24-inch, 2023) iMac (Two Ports, 24-inch, 2023) MacBook Pro (M3 Max, 16-inch, Nov 2023) Mac Pro (2023) Mac Studio (M2 Ultra, 2023) Mac Studio (M2 Max, 2023) MacBook Air (15-inch, M2, 2023)

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