macOS 12.5.1 (21G83)
iMac 24-inch (M1, Two Ports, 2021)
UniversalMac_12.5.1_21G83_Restore.ipsw
Device
iMac 24-inch (M1, Two Ports, 2021)
SHA1
478eca5466157a6eef5cdba8f75884b224c6d3f6
SHA256
97a5c61e21e9ddf25158ec9dca67b482205f9dd311d274a1a59915b4bb042c83
MD5
3d5f06ed500a29f29f82318e0e7fbe4b
How to Restore macOS 12.5.1 IPSW
🖥
iTunes (Windows / macOS Mojave and older) & Finder (macOS Catalina+)
- Download the UniversalMac_12.5.1_21G83_Restore.ipsw file to your computer.
- Connect your iMac 24-inch (M1, Two Ports, 2021) to your computer with a USB cable.
- Open Finder (macOS Catalina+) or iTunes (Windows / older macOS) and select your device.
- To Update (keeps data): hold Option (Mac) or Shift (Windows) and click Check for Update.
- To Restore (erases data): hold Option (Mac) or Shift (Windows) and click Restore iPhone/iPad.
- Navigate to and select the downloaded .ipsw file, then confirm.
- Wait for the process to complete — do not disconnect the device.
⌨️
idevicerestore (Command Line)
An open-source command-line tool that restores IPSW files without needing iTunes. Useful for advanced users, automation, and custom restore workflows.
- Install via Homebrew:
brew install idevicerestore
- Connect your device and put it into DFU mode.
- Run the restore command:
idevicerestore -t UniversalMac_12.5.1_21G83_Restore.ipsw
Common flags:
-eErase restore (factory reset)
-uUpdate restore (keep data)
-dEnable debug output
-nDry-run — don't actually restore
🔓
futurerestore (Saved Blobs / Downgrade)
futurerestore allows restoring to any firmware when you have saved APTickets (blobs) from a tool like TSSSaver or shsh.host.
- Download futurerestore from github.com/futurerestore/futurerestore.
- Ensure you have a saved .shsh2 blob for macOS 12.5.1 (21G83) on your iMac 24-inch (M1, Two Ports, 2021).
- Put your device into DFU mode and run:
futurerestore -t your_blob.shsh2 --latest-sep --latest-baseband UniversalMac_12.5.1_21G83_Restore.ipsw
⛔ Warning: Using --latest-sep requires the latest SEP to be compatible with macOS 12.5.1. Always verify compatibility before restoring to avoid a bricked device.
📲
Entering DFU Mode
DFU (Device Firmware Update) mode is required for most manual restores. The button combination varies by device:
iMac 24-inch (M1, Two Ports, 2021)
Connect device to computer, then follow the on-screen instructions in iTunes/Finder to enter DFU mode.
💡 Tip: In DFU mode the screen stays completely black. If you see the Apple logo or a "Connect to iTunes" screen, you entered Recovery mode instead — try again.
⇓ Download IPSW Firmware (13.12 GB)
