Sonos can't connect to my mac for music library on iTunes

I had the same issue with not being able to connect to my iTunes library on my Mac (10.10.4) after the latest controller update, so i tried removing the library and readding and now each time i add it, it goes through the process of adding / syncing and then it never shows up in the music library window.
Renaming my computer isn't really an option given other dependency related to that. Any help greatly appreciated.
Hi Steve.  However you feel about renaming the computer, please could you confirm what the computer's name for sharing and NetBIOS name are (see link below)?  Are you adding the folder to Sonos by selecting the "in my iTunes folder on this computer" or by browsing to it?  Are you using the Controller on the Mac itself to try to add the folder?

https://sonos.custhelp.com/app/answers/detail/a_id/2413/~/mac-os-x-music-sharing-help

Hi Ryan, 

I've tried all of the above and still can't get it to work. 
The diagnostic ref no. is: 4763152

Thanks!
Thanks for that diagnostic. The players aren't able to get the name of the computer to respond properly on the network. This could be caused by a firewall on the computer preventing the resolution, an issue with the router not recognizing the computer properly, or some other trouble on the network.

Have you tried renaming the computer and adding the library again? I have some steps for doing this here and you can find it on this FAQ page too. Once you've renamed the computer, rebooting the router will make sure the new name is registered. Make sure you reboot your computer too.

Do you have the OS X firewall turned on or a different firewall or security software running?

Let us know how it goes.

Hi Ryan, 

I've tried all of the above and still can't get it to work. 
The diagnostic ref no. is: 4763152

Thanks!

@RT than you for this - this solved my problem too.  Finally I have Sonos working on my iMac.  I have to ask: why on earth have Sonos implemented the Mac client in such a complicated way?  The music is on the disk drive on same Mac that the Sonos client is running on - why on earth doesn't it just read it - why do we need to bring in dodgy Windows technology (SMB) to share a drive - there has to be a simpler way.

Thank you Ryan for your reply. I have actually now managed to remove and re add my music library , but had to do it from my desktop Sonos app, and not from my I Phone app. (That doesn't work!) 
Deleting the old library and letting Sonos find the new library name seems to do the trick !!
Thanks for getting back .
Jon
I managed to do this by going into sharing settings and ticking the SMB option and clearing the AFP option.

Thank you Ryan for your reply. I have actually now managed to remove and re add my music library , but had to do it from my desktop Sonos app, and not from my I Phone app. (That doesn't work!) 
Deleting the old library and letting Sonos find the new library name seems to do the trick !!
Thanks for getting back .
Jon
Great to hear. You do need to do that from the computer, as likely the sharing settings on the machine were reset during the operating system upgrade. The phone can't setup those permissions on the computer. 

Let us know if you have any further trouble, we're here to help.

Hi Jon and Tony,

In most situations, music shares will work just fine following an operating system upgrade. However, changes to an operating system may result in potential file sharing issues in some situations, as many important system files are re-written or replaced. Usually these problems can be resolved quickly via configuration changes.  

Take a look at these troubleshooting suggestions and let us know how it goes.

General Troubleshooting Suggestions:

1. Remove and re-add your music library from that computer under Manage > Music Library Settings. (Jon, you've already done this step I see.)
2. Rename the computer and add the library again. Described in my post below in detail, and on this FAQ page.
3. Finally, you can manually setup a share and add your music library through the network sharing option.

If you’re still not able to get your music share working following the update to Yosemite, please send a diagnostic and reply back with your confirmation number. We’ll take a look at it for you.

..I should also say that everything was great until the Yosemite upgrade . No problems with 18,000 tracks . So please.........no technical stuff about file types,codecs, blah blah. There are too many people on many forums, complaining about the same subject. 

Can you please follow the directions on this guided assistance FAQ to get that music library up and running? It sounds like you've already done most of those directions, but we'd like to recreate the error messages on the players for the next step. If you're still having trouble, can you please submit a diagnostic and reply back with your confirmation number?

Thanks.