Skip to main content

macOS 11 Big Sur Release Information

Big Sur Release Information

Apple's most recent operating system, macOS 11 Big Sur, comes pre-installed on new Macs and is available as an upgrade for compatible Macs. For a full listing of new features, please visit the official macOS Big Sur information page.

macOS 11 Big Sur is Supported, not Recommended

Due to ongoing compatibility issues, OIT recommends most people wait to upgrade to macOS 11. Customers who have purchased new devices that came with Big Sur installed, or have an older operating system that needs an update should have no major problems with Big Sur, and OIT will support your IT needs if you upgrade.

OIT recommends that before upgrading to any new operating system, ensure your most used applications are compatible by checking the compatibility issues table below, or by contacting the vendor directly. You may also want to check if your device is compatible with Big Sur

Generally speaking, it’s best to wait to upgrade until a second or third minor release (or dot release, e.g. 11.2, 11.3, etc.) of an operating system is available. Later releases are generally more stable and have fewer compatibility issues. Minor releases are issued frequently and OIT will adjust its recommendation as key incompatibilities have been addressed.

If you choose to upgrade and run into problems that cannot be resolved, you may need to revert to an earlier version of macOS, which entails backing up your files and doing a fresh install. For assistance, please bring your computer to an OIT Buff Techs Walk-In Center, contact Dedicated Desktop Support, or contact the IT Service Center at 303-735-4357 or

Dedicated Desktop Support Customers

Mac systems that are enrolled in Dedicated Desktop Support are still being prevented from upgrading to macOS 11 Big Sur, as OIT works to resolve significant compatibility issues with standard applications and campus IT infrastructure. In the meantime, if you are supported by DDS and are interested in upgrading or have any questions about Big Sur, contact your DDS Technician.

Applications with compatibility issues

OIT has tested supported software for compatibility issues with Big Sur. The following table has information on software with ongoing compatibility issues as well as updates to software previously incompatible with Big Sur. We will continue to update this list if we find new issues, or as incompatibilities are resolved. 

Application Compatible with Big Sur?  Updates 
Adobe Acrobat Adobe Acrobat DC, Acrobat 2020 and Acrobat 2017 are now compatible with Big Sur.
Adobe Creative Cloud Adobe Creative Cloud is compatible with Big Sur. Refer to Adobe's compatible version information for each app you use before upgrading.
Cisco AnyConnect Version 4.9 is required for compatibility. Download and installation instructions are now available.
Google Chrome The latest versions of Chrome are compatible with Big Sur.
Large Lecture Halls OIT has tested Big Sur on Large Lecture Hall AV systems and determined possible audio and video functionality issues. We recommend avoiding using Big Sur in those spaces at this time.
Microsoft Defender ATP The latest version is compatible. 
Microsoft Office 365 The latest versions of Microsoft Office O365 are compatible with Big Sur. Check for Updates within Office applications to ensure you have the most current version.
Microsoft Office 2016 Office 2016 is not compatible with Big Sur. Upgrade to Office 365 or Office 2019.
Microsoft Office 2019 The latest version of Office 2019 is compatible with Big Sur. Check for Updates within Office applications to ensure you have the most current version.
Sophos Home Edition Not yet compatible with Big Sur.
Zoom Web Conferencing The latest version of Zoom (5.5.1) is compatible with Big Sur. OIT is working to identify any potential problems with updated Zoom versions as they are released. Common issues will be posted on the Zoom - Known Issues page.