Download macOS 26.6 RC (25G70) for iMac (24-inch, M4, 2024, Two Ports)
✓ This firmware is signed. This means that you can restore to it in Finder, the Apple Devices app, iTunes, or idevicerestore.
macOS 26.6 RC Release Notes
Please note, the documentation below is supplied from Apple's update servers. We don't modify the contents of this documentation.
This update addresses bugs and security issues and also optimizes the Spotlight index in preparation for macOS 27.
For information on the security content of Apple software updates, please visit: support.apple.com/100100.
Related IPSW
View all IPSW beta for this Mac| Version | Released | File Size |
|---|---|---|
|
26.6.2 RC
25G82 |
August 10, 2026 | 19.77 GB |
|
26.6 RC
25G70 |
July 20, 2026 | 19.77 GB |
|
26.6 beta 5
25G5065a |
July 13, 2026 | 19.77 GB |
|
26.6 beta 4
25G5057c |
July 6, 2026 | 19.77 GB |
|
26.6 beta 3
25G5052e |
June 29, 2026 | 19.77 GB |
|
26.6 beta 2
25G5043d |
June 15, 2026 | 19.91 GB |
|
26.6 beta
25G5028f |
May 26, 2026 | 19.91 GB |
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)
- 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.
- Put the Target MacBook into DFU Mode:
- Shut down iMac (24-inch, M4, 2024, 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, M4, 2024, Two Ports) should appear as a device in DFU mode.
- Apply the IPSW File:
- Open Apple Configurator on the second Mac.
- Select your iMac (24-inch, M4, 2024, Two Ports) in DFU mode from the device list.
- Drag UniversalMac_26.6_25G70_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 26.6 RC.
- 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, M4, 2024, Two Ports) will restart automatically.
- Set Up the MacBook:
- After the restore, your iMac (24-inch, M4, 2024, 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.