Download macOS 27.0.1 (26A434) for Mac mini (M6)

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 Mac mini (M6) 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 Mac mini (M6) should appear as a device in DFU mode.
3. Apply the IPSW File:
   • Open Apple Configurator on the second Mac.
   • Select your Mac mini (M6) in DFU mode from the device list.
   • Drag UniversalMac_27.0.1_26A434_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 27.0.1.
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 Mac mini (M6) will restart automatically.
5. Set Up the MacBook:
   • After the restore, your Mac mini (M6) 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.