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

Download macOS 11.5 RC 2 (20G71) for iMac (24-inch, M1, 2021, Two Ports)

Released
July 19, 2021
Version
macOS 11.5 RC 2
Build
20G71
Identifier
iMac21,2
Filename
UniversalMac_11.5_20G71_Restore.ipsw
File size
13.96 GB
Download13.96 GB

Related IPSW

View all IPSW beta for this Mac
Version Released File Size
11.5 RC 2
20G71
 July 19, 2021 13.96 GB
11.5 RC
20G70
 July 13, 2021 13.96 GB
11.5 beta 5
20G5065a
 July 8, 2021 13.94 GB
11.5 beta 4
20G5052c
 June 29, 2021 13.93 GB
11.5 beta 3
20G5042c
 June 14, 2021 No filesize available
11.5 beta 2
20G5033c
 June 2, 2021 No filesize available
11.5 beta
20G5023d
 May 19, 2021 No filesize available

Installation Instructions

Always back up your devive before installing beta software. You can back up your Mac using iCloud, Time Machine, or another storage device.

Prerequisites

  • Second Mac: Another Mac of any model using macOS Sonoma 14 or later.
  • USB-C Cable: A high-quality USB-C cable to connect the two Macs.

Steps to Restore (and Update)

  1. Install Apple Configurator on the Second Mac
    • Download and install Apple Configurator from the Mac App Store on the second Mac if it’s not already installed.
  2. Put the Target MacBook into DFU Mode:
    • Shut down iMac (24-inch, M1, 2021, Two Ports) you want to restore.
    • Connect it to the second Mac using the USB-C cable.
    • Enter DFU (Device Firmware Update) mode.
    • In Apple Configurator on the second Mac, your iMac (24-inch, M1, 2021, Two Ports) should appear as a device in DFU mode.
  3. Apply the IPSW File:
    • Open Apple Configurator on the second Mac.
    • Select your iMac (24-inch, M1, 2021, Two Ports) in DFU mode from the device list.
    • Drag UniversalMac_11.5_20G71_Restore.ipsw file onto the device icon in Apple Configurator, or use the menu: Actions > Restore.
    • Confirm the action when prompted. This will erase the MacBook and install macOS 11.5 RC 2.
  4. Wait for the Process to Complete:
    • The restore process will take some time (15-30 minutes or more, depending on the file size and connection speed).
    • The MacBook’s screen may show a progress bar or Apple logo during the restore.
    • Once complete, your iMac (24-inch, M1, 2021, Two Ports) will restart automatically.
  5. Set Up the MacBook:
    • After the restore, your iMac (24-inch, M1, 2021, Two Ports) will boot into the setup assistant.
    • You can set it up as new or restore your data from a backup.

Note: Using an IPSW file with Apple Configurator always performs a full restore, erasing all data. There is no option to "update" macOS (preserving data) using an IPSW file directly.