Support for macOS Big Sur

Effective February 1, 2021 HMS IT now provides full technical support for macOS Big Sur version 11.2 and newer. To maintain maximum performance and compatibility please make sure to apply all operating system and application updates.

You can find more information by navigating to the macOS Big Sur compatibility knowledge article. You can also contact HMS IT by phone at 617-432-2000 or by email at


Due to an issue with the Big Sur installation process, there is a significant risk of losing important data on your computer if there is not enough space on the disk drive. Please make sure you have at least 50 GB of free on the disk drive prior to downloading and installing Big Sur.