iCloud doesn't work on MacOS 14 Sonoma

Every other complex non solution should be deleted from this thread.

THIS IS THE ONE THAT WORKS. And it is the least complex.

Turn off WIFI.

Sign out of iCloud.

Turn on WIFI.

Sign in to iCloud.

Accept Terms and Agreements..

Your solution does not work because all of the buttons associated with I-cloud do not work. Glad it worked for you, but from the thread it appears that this issue effects oll functions related to I cloud. Yes even the “sign out” button.

Trying to avoid a complex fix as well I followed the advise of xz8t83 and set up a new User with admin privildges, restarted the Mac and logged in as new user, still no internet access, logged out, gave up hope, only to find issue resolved on my original account. Actual Solution in under 3 min. , leaving only a ghost profile. thanks xz8t83.

My iCloud problem with Notes seems to have been sorted in the latest update. I had a long session with their help and had to upload capture data etc to them. Then a few days later the update happened and my problems went away!!

Well I have eventually sorted the issue. Now on 14.3.

After two long sessions on line to no avail and almost all day at an Apple shop with a genius still not sorted.

So decided to go nuclear 😳

I backed up my IMac then disconnected the Time Machine HD.

I then reformatted the main HD and started the IMac in recovery mode. Loaded up Somoza 14.3 .

Hey presto ICloud was restored.

Then took the decision to reload all my programs manually one by one, checking ICloud status each time.

after loading all that I required I tested it for two/three days and all was well.

Then took the big decision to reformat the Time Machine, as I felt the problem must have laid in there somewhere.

After reformatting I backed up the main drive . Touch wood all has been OK since.

Still don’t know what caused the original problem but at least it all works OK now.

Downside is I have lost my excuse to upgrade to the latest iMac 😂😂😂😂

Under the heading of: I'm not really sure? Maybe some developer[s] will say I am blowing smoke?

Thinking here that perhaps someone new in development, perhaps a contractor from overseas, may not understand the concept of event loops. Last time I debugged this it turned out 'he' had created multiple event loops with arbitrary jumps between one event loop and another. Some library may be damaged? Two crashes?

I don't know.

Application Specific Information:

BUG IN CLIENT OF LIBPLATFORM: os_unfair_lock is corrupt, or owner thread exited without unlocking

Abort Cause 35334

From the developers' forum back in ancient pre-SWIFT times.

The problem is resolved by switching to posix_spawn(). I stil haven't tested that on 10.6-10.11 yet though. My GCD version didn't work on older OS versions. My NSTask version started failing in 10.11 and didn't work at all in 10.12. That's why I switched to fork() to begin with. One out of 4 APIs is functional.

There is also this:

https://stackoverflow.com/questions/72573424/error-libsystem-platform-dylib-os-unfair-lock-corruption-abort-during-saving-da

You discuss Mojave - this whole issue is related to the New Sonoma 14? I can't even get my System Settings to allow me to access it - this page is grey lite.

Yes. Updated it today. The problem persists.

It maybe lagging because it is synchronizing. Did you enable the "Optimize Mac Storage" slide and enable Notes in the iCloud options (see below).

Maybe that could work to my case too, but what happens if I can't disable it ??

I click on the "Sync this Mac" button.....

but nothing happens... It stays enabled!

Hello shellhornj,

Thanks for checking. Since it's still not working on the new macOS, please contact Apple Support to investigate this more.

https://getsupport.apple.com

Thanks.

me too!

Hi, I got apple support and it still didn't work. Even with my network provider. Out of nowhere it started working today. Lost 2 days work.... Magically started....

SAME! Maddening!! I wish there were a solution.