UPDATE:
So, my fix worked YAY! then I closed the app (you know because I am a gluten for punishment). I then re-launched it. The VERY first thing the macOS Sonos 2 controller app did was name my mac [Computer Name +1] so I had to go re-re-fix that. Then it wouldnt connect. I then rebooted and it connected… YAY!

Oh… I celebrated too soon. The nightmare continues.

I re-create, re-set up and nothing will allow me to connect to it again. Even re-doing all of my steps above. This stuff just doesnt want to work. My phone couldnt connect, my iPad couldnt connect. Literally $2000 in speakers and nada… zip, zilch, zero sound (ever wonder why words that mean nothing always start with “Z”) I digress.

The *stuff* dont work

So, I give. I uninstall the Sonos 2 (Gold because its awesome version) and re-install on my ipad. The iPad immediately connects. I am now jamming. I do the same on my phone, BoooYa! now it magically works to.

My Mac… meh, it no workie. 

So, I finally said “F’IT” im done. It works. Not the way I want it to, but it works.

In the process of looking on the Sonos site, I managed to log in and see that I get a whopping 15% off this overprice kinda work speaker and software set if I upgrade. This made me wonder. The Sonos software 100% sucks. It does nothing a bluetooth JBL or $20 speaker at a 7/11 will do over bluetooth. No wifi, no fancy UI. Just connect and stream whatever you can play on your device. Its a Shame the Sonos software tries to be more than it needs to. While “Trueplay” and tuning are indeed cool and something i did when setting up my theater, its not necessary for 2 speakers in my office and sure not worth all the time I spend fixing this stuff with each software update.

Sonos - you should give everyone more than 15%. especially those of us that have a ton of your stuff. 

oSave Ferris]

*Moderator Note: Modified in accordance with the community guidelines.*

OK….

I FIXED IT….
Problem (for whatever reason) was the server name was incremented by 1 ycomputer name-x] was incorrect. So, the fix after wasting 2 hours of my life was this:

1- Go into Mac Settings for SHARING
2- File Sharing - make sure that Sonos can access (read/write) all files in music
3- Go into Media Sharing and under computer name, if you hit edit, make sure that the number displaying in the error box matches what is used in the computer name. My Sonos app said acomputername-3] and in my Media sharing it was set to 4. so a change of the number fixed this.

4- Once you change the media number you need to lock the preferences and then quit Sonos and re-start it.

4- RE-RE-RE-Add your music library (Have I mentioned what a PITA this software is yet..?)
5- Once the library is re-added, it will index it and then (god willing) you can listen to music again.

I really dislike being FORCED to upgrade something for features I don't care about or wont use. This is a music system. All I wanna do is listen to music, so the good people at Sonos REALLY need to figure out how to make their warez work without wasting hours of my life like this once or twice a year. If these speakers didn't sound so damn good and cost so much, I would literally change to a simple amp+awsome speakers and a Bluetooth input. that never breaks. This is dumb.

I should really send Sonos a bill. I run InfoSec and IT for a living. I shouldnt have to do this on a weekend just to listen to a song. If I didn't have ADHD for my stuff working at home I wouldn't have wasted the time. I do hope that these steps for the fix help someone else.

TLDR:
Great Speakers, crappy software update process = PITA to keep working