The OneDrive engineering team is committed to bringing you the best, most secure, end user experience possible. To support that commitment, the OneDrive Desktop application (sync client) is updating the matrix of supported operating systems to align with Office 365 and Windows support. These changes will go into effect November 1st, 2017.
NOTE: These operating systems have been out of mainline support for several years now
After November 1st, OneDrive will be phasing out support for the following operating system versions:
Here's what will happen:
To ensure a smooth transition we recommend that you upgrade machines on Windows Vista, Windows Server 2008, or Mac OS X 10.9 to supported operating systems before November 2017.
What operating systems are still supported? We will continue to support:
-The OneDrive Engineering Team