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MacBook Pro (16-inch, M1 Pro, 2021)

Download macOS 27.2 (26B123) for MacBook Pro (16-inch, M1 Pro, 2021)

Released
October 26, 2026
Version
macOS 27.2
Build
26B123
Identifier
MacBookPro18,1
Filename
UniversalMac_27.2_26B123_Restore.ipsw
File size
25.60 GB
Download25.60 GB

macOS 27.2 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 provides enhancements to Siri AI with the ability to retain useful context from previous Siri interactions as well as draw from a wider range of personal context. It also introduces Suggestions in Messages that help you take quick actions in apps like Calendar and Reminders based on context from your conversation. This release includes additional features, bug fixes, and security updates for your Mac.

For information on the security content of Apple software updates, please visit: https://support.apple.com/100100

Some features may not be available in all regions or on all Apple devices. To learn more, visit apple.com/macos/feature-availability.

Usage limits may apply for some Apple Intelligence features, including but not limited to Siri AI, Intelligent Photo Editing Tools, Image Playground and AFM 3 Cloud models in Shortcuts. To learn more, visit apple.com/apple-intelligence

Software updates, like these, add new features and improvements that may affect performance or battery life. To learn more, visit support.apple.com/125039

Related IPSW

View all IPSW beta for this Mac
Version Released File Size
27.2
26B123
 October 26, 2026 25.60 GB
27.2 RC
26B118
 October 19, 2026 25.60 GB
27.2 beta 4
26B5112a
 October 13, 2026 26.71 GB
27.2 beta 3
26B5101f
 October 5, 2026 26.55 GB
27.2 beta 2
26B5091g
 September 21, 2026 26.54 GB
27.2 beta
26B5086k
 September 16, 2026 26.54 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)

  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 MacBook Pro (16-inch, M1 Pro, 2021) 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 MacBook Pro (16-inch, M1 Pro, 2021) should appear as a device in DFU mode.
  3. Apply the IPSW File:
    • Open Apple Configurator on the second Mac.
    • Select your MacBook Pro (16-inch, M1 Pro, 2021) in DFU mode from the device list.
    • Drag UniversalMac_27.2_26B123_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 27.2.
  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 MacBook Pro (16-inch, M1 Pro, 2021) will restart automatically.
  5. Set Up the MacBook:
    • After the restore, your MacBook Pro (16-inch, M1 Pro, 2021) 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.