"Sonos was unable to add the music folder"

Yosemite definately a no go. Everything else works fine but no access to library.

Yeah same issue here. We may need to wait until Yosemite is officially released before we can expect full compatibility and support. These are the risks we take running beta...

This just cropped up today, win7 64bit sp1, music folders on one internal drive, three folders were added effortlessly at setup, another folder on a USB attached Drobo was added as well, now I can't any other folders and the existing ones are no longer accessible.  I've tried with both the windows firewall on with ports open and firewall off on private networks.

Sonos bridge via Ethernet on the wireless router, pc attached via Ethernet to wireless router, Sonos playbar and sonos 5 attached.....Help..

Same problems here. Sonos controllers aren't seeing the local file, or the machine in general that it is installed on. Can't connect with networked drives either. Regardless of security settings. I thought 5.1 was supposed to fix this?

I am on 10.9.4, and having the same issue

Windows 7 64 bit. Same issue. No resolution.

I had a similar problem (after upgrading to PC controller 5.1). I have two libraries on an external hard drive, and one library on my internal (C:\) drive. The libraries on external drive played without any problem.
When I tried playing a track from the library on internal drive, I got a message that the file could not be opened. I (temporarily) disabled my firewall ... problem remained.

I deleted the library from PC controller, and then tried to re-add it. Got message that Sonos was unable to add the library.

Without boring you with the details, I finally found this page:
https://sonos.custhelp.com/app/answers/detail/a_id/266

I followed the instructions, and the problem was solved ... I was able to re-add the library, and play tracks from it.

I used the ERROR-900-fix.reg script (downloaded from the above-mentioned page), and I followed the instructions to restart the Server service (which also caused the Browser service to be restarted).

Hope this works for others having a similar problem.

I have OSX 10.9.4 and still can't add the music folder... what should I do??

Hi Gunnar, I have a Mac with Retina display running OSX 10.9.4 and I just can't add the music folder from my iTunes... I already turned off the firewall and I still have the problem. Please I need some help. I have both Play5 and Amp Connect...

Well, as of the latest version of Mac Yosimite, the Sonos app now works. It now finds the default Music folder. Takes a while to index, but it's working.