OneDrive sync client will no longer update or be supported (Breathe! This Effects Macs Only!) Bad news for users of macOS Sierra 10.12 and macOS High Sierra 10.13 - Act by: September 10 - If your organization is not using macOS you can safely disregard this message. The MSFT OneDrive team is committed to bringing you the best, most secure experience possible across your devices. As such, MSFT is ending support for the OneDrive Desktop application (sync client) on macOS Sierra 10.12 and macOS High Sierra 10.13 and focusing our resources on new technologies and supported operating systems. Going forward, only the three most recent versions of macOS will be supported. Please be on the lookout for your clients that may be running these older versions! We need an upgrade path in place before 9/10.