iMac (24-inch, M1, 2021)

iMac (24-inch, M1, 2021)

  • ModeliMac21,2
  • Boardj457ap
  • SoCT8103
  • ChipApple M1
Signed

macOS 27.2 (26B123) is signed

Apple's signing server is signing this firmware, so you can restore or update to it now. Checked with Apple .

Signed since release, Oct 26, 2026. Apple lists it until Feb 3, 2027.

Released October 26, 2026

Download IPSW 25.6 GB

From updates.cdn-apple.com (Apple). Signet never hosts files.

Restore images (IPSW) 1

VersionReleasedStatusExpiresSize
macOS 27.2 26B123Oct 26, 2026Signed Signed by Apple Signed since release, Oct 26, 2026. Apple lists it until Feb 3, 2027. Apple doesn't publish signing end dates; Signet records them by checking on a schedule. Apple's listed expiration Apple's update server (gdmf.apple.com) lists this build until February 3, 2027. Apple can stop signing it sooner, usually a week or two after the next release.25.6 GB
Download

Specifications

Chip
  • Apple M1 chip 8-core CPU with 4 performance cores and 4 efficiency cores
  • 7-core GPU, 8-core GPU
  • 16-core Neural Engine
Capacity
  • 256GB SSD or 512GB SSD Configurable to: 512GB, 1TB, or 2TB
Display
  • 24-inch 4.5K Retina display
  • 4480-by-2520 resolution at 218 pixels per inch with support for 1 billion colors
  • 500 nits brightness
  • Wide color (P3)
Ports
  • Two Thunderbolt / USB 4 ports with support for: DisplayPort
  • Thunderbolt 3 (up to 40Gb/s)
  • USB 4 (up to 40Gb/s)
  • USB 3.1 Gen 2 (up to 10Gb/s)
  • Thunderbolt 2, HDMI, DVI, and VGA supported using adapters (sold separately)
Wireless
  • Wi-Fi Wi-Fi 6 (802.11ax)
  • IEEE 802.11a/b/g/n/ac compatible
  • Bluetooth Bluetooth 5.0 wireless technology
Size & weight
  • 461 × 547 mm, 4460 g
Colors
  • Blue
  • Green
  • Pink
  • Silver
  • Yellow
  • Orange
  • Purple

Source: Apple Tech Specs