macOS 27 upgrade required for compatible UNSW Macs 

Before you upgrade

Before installing macOS 27, we recommend that you:

1. Save and close any open work

2. Ensure important files are synchronised to OneDrive

3. Ensure you have up to 30 GB of free disk space available for the upgrade.

4. Connect your Mac to a power source

5. Allow enough time for the installation to complete uninterrupted

If you use a specialised application for teaching, research, or administrative work and have concerns about compatibility, contact the IT Service Centre as soon as possible.

Important: Once upgraded to macOS 27, you may not be able to revert to an earlier macOS version without rebuilding your device.

What's changing in macOS 27?

macOS 27 introduces updates designed to improve the everyday experience of using your Mac, including:

Improved performance and reliability

• Enhancements to system performance, stability and responsiveness help provide a smoother experience across everyday tasks.

Updated built-in applications

• Several Apple applications, including Safari and productivity tools, have received usability improvements and new features. 

Enhanced automation

• Updates to the Shortcuts application make it easier to automate repetitive tasks and workflows.

Security improvements

• macOS 27 includes the latest security enhancements from Apple to help protect devices and data.

AI-powered features

• Some compatible Mac devices may support Apple Intelligence features introduced by Apple.

While these features are available within macOS, UNSW's recommended AI tools for work and study remain University-supported services such as Microsoft Copilot and other approved AI platforms. Staff and students should follow UNSW guidance when using AI tools with university information.

How to upgrade to macOS 27

Eligible Macs will receive daily reminder notifications. Select a notification to open System Settings and begin the upgrade. If you have not upgraded within 24 hours of the deadline, reminders will arrive hourly.

1. Open System Settings
2. Select General
3. Select Software Update
4. Locate the macOS 27 upgrade
5. Select Upgrade Now or Upgrade Tonight, then follow the on-screen instructions.
6. Your Mac will restart during the installation. The upgrade typically takes 15 to 30 minutes, depending on your Mac’s performance and internet connection speed.

What happens if you miss the deadline?

If your Mac has not been upgraded by 7:00am Friday, 11 December 2026, the upgrade will begin automatically.

If your Mac is asleep or powered off at that time, you will see a notification the next time you use it advising that the deadline has passed.

Select the notification to begin the upgrade immediately, or wait for the upgrade to start automatically after one hour.

Frequently asked questions