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

Same here. Really frustrating!!!!!!!!

Hi I am having the same issue as many users and have tried all suggested fixes to no avail, here is the diagnostic
7823803
The error message i get is "Sonos was unable to add the music folder" "The computer "" refused to let sonos connect to it"
I am browsing to the music folder
Please help, frustrating having a useless sonos

I've encountered the same issue. Without any systems changes, the Sonos app could not find the server. The solution, thanks to one of the earlier replies, is to check file sharing settings. I'm using an iMac with OS X 10.10.5 Go into System preferences/sharing/options and select the account (i.e. tick the box along side your name, then tick the boxes above for SMB and AFP. That resolved the problem and reloaded the full music library.
Why it happened in the first place is a mystery. I hope this is useful to other experiencing this issue.

Same problem on my Mac after years of seamless use. What happened? My diagnostic Your confirmation number is: 8274536.

SO frustrated with Sonos! Have spent hours with them trying to correct the following issue to no avail. My Sonos will play music I have downloaded to my iPhone but it WILL NOT not connect to my iTunes folder on my iMac.I get a message that says either “unable to add shared folder” Or that says my “file sharing settings need to be adjusted”.
We have tried eight ways to Sunday to fix this and nobody at Sonos seems to be able to solve this issue. They blame it on Apple and so I call Apple and Apple says it is definitely a Sonos issue. How can it possibly be that I can play my music when it is downloaded onto my phone but I cannot play my music that is in my iTunes folder on my iMac… How Come Sonos cannot connect to this??!!!

Could this be a netbios (computer) naming convention issue ... see this link:

https://support.microsoft.com/en-us/help/909264/