Readers are reporting that they cannot connect to certain file servers and network attached storage (NAS) devices after updating their Macs to OS X 10.9. Mavericks is backward compatible with all file sharing devices, according to Apple, though it now defaults to the new SMB 2 file sharing protocol. The older CIFS/SMB and AFP protocols are still supported (contrary to what some of the tech sites have reported).
Reports from readers indicate that Mavericks may not be switching to SMB or AFP when a device doesn’t support SMB2. It’s also possible that Apple’s implementation of SMB2 is not compatible with certain devices.
Ron Wilfred has a problem connecting to Windows:
After upgrading my MacBook Pro (2011) to Mavericks, I can no longer connect to my Windows 8 PC for file sharing. It worked perfectly before, but now won’t now. I can still connect to the PC from an iMac with Lion.
Garth Bell can connect to his NAS device but can’t open files:
I have an iMac that I upgraded with Mavericks. Whenever I connect to a Netgear ReadyNAS from the Finder, it won’t let me open files. When I double-click a file I get an Error -36 message saying it can’t open the file. I can copy files from the NAS to my Mac and back again as a workaround, but this is a pain.
Jeffery loses a connection after sleep:
Mavericks has made connections to my NAS drive temporary. When my Mac goes to sleep, the drive is gone. I can bring it back after a restart. This is annoying enough to make me want to go back to Mountain Lion.
If you’ve seen a problem with Mavericks and files sharing let us know .
TIP: Force SMB1 (CIFS) as workaround to Mavericks file sharing
Several readers offered a suggestion for yesterday’s report of problems with OS X 10.9 Mavericks accessing some Windows file servers and network attached storage device. Mavericks now defaults to SMB2 file sharing protocol, but a bug seems prevent OS X from using SMB1 or AFP when the server doesn’t support the newer SMB2.
A workaround is to force OS X to use the old SMB1 (also known as SMB/CIFS). To do that, instead of mounting the server using the Finder, use the Connect to Server command in the Finder’s Go menu. Then type in the following:
cifs://server_address (using the IP address or network name of the server)
Using smb://server_address won’t work, as this will use SMB2 to access the device.
Thanks to Mario Cajina and Kevin Lepard for the suggestion.
If you’ve tried this workaround let us know.
TIP: Using CIFS speeds Mavericks filesharing
Bill Haynes said that the reported workaround for broken filesharing in Mavericks not only works, but speeds up moving files and sending attachments via Mail through Exchange Sever. Haynes reports:
Wow! Changing my server mount to the cifs prefix resulted in a huge speed gain. I run AutoCAD Architecture 2012 in Parallels 9. Loading and saving to the windows server and the updating of external references had really slowed down to a crawl after I upgraded to Mavericks.
Also, adding attachments in Mail and sending is now much faster. Our Windows server is also our Exchange server. I have been having problems getting Mail to send when I attached files from the server. Instead,, the message would just hang in the outbox.