Yosemite to default to SMB 3 file sharing

By John Rizzo

Apple's OS X 10.10 Yosemite Mac OS will include Microsoft's SMB 3 file sharing protocol, according to Wisely Guide and various user forum posts. The addition of SMB 2 as the default file sharing protocol in Mavericks has caused headaches with Mac clients and servers connecting to Windows servers and clients. Microsoft is using SMB3 is in Windows Server 2012 and Windows 8.

Some users are saying that SMB 3 will be Yosemite's default file sharing protocol. SMB2 is the default in Mavericks; turning it off is the workaround to many of Maverick's problems. Yosemite, which is due for release within a few weeks, will continue to support SMB 2, SMB 1, and AFP for file sharing, according to the reports.

Microsoft says that SMB 3 is faster and more secure than SMB 2, providing encryption of data transmitted over the network as well as other new security measures. Whether SMB 3 in Yosemite solves any of the problems of SMB2 in Mavericks isn't yet known.

Posts in user forums around the web report that mention of SMB 3 appears in Apple descriptions of OS X Server 4 developer builds. Since Apple typically includes the same file sharing technology in both client and server, it is likely that the Yosemite Mac client will also default to SMB 3 for file sharing.