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"iCloud... I'm Already Signed In!" Stop with the "This iMac can't connect to iCloud... Open iCloud preferences to fix this problem."

I don't know what the problem is but these windows keep popping up.... after login and while logged in. Clicking on "Later" or opening "iCloud Preferences..." makes no difference.


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But I'm already signed in! Another Post-El Capitan upgrade glitch? They're minor annoyances but piling up to become a major aggravation.


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iMac (Retina 5K, 27-inch, Late 2015), OS X El Capitan (10.11.1), 24 GB Memory

Posted on Nov 10, 2015 7:29 PM

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10 replies

Nov 13, 2015 11:22 AM in response to gail from maine

I'm still unclear with this 2-Step Verification thing. Not sure I have/use it now. And I haven't used Messages or FaceTime on this new iMac. This was not an issue pre-migration from old iMac running El Capitan. Otherwise, the window hasn't popped up in a few days. Very sporadic. Can't pinpoint what causes it, typically after login I think.

Feb 19, 2016 2:06 PM in response to Sapote

It's back! Once again that problem with iCloud window popping up and asking me to sign in when I'm already singed in and everything is the same as it's been - no settings have been changed. Is it iCloud? Seems fine once I open Settings and cancel sign in window, since I'm, you know, already singed in. Is it the internet? That's working. No idea what is going on here, but it suddenly starts popping up last week after 2-3 months without incidence.

Feb 19, 2016 4:27 PM in response to Sapote

Go to Finder and select your user/home folder. With that Finder window as the front window, either select Finder/View/Show View options or go command - J. When the View options opens, check ’Show Library Folder’. That should make your user library folder visible in your user/home folder. Select Library. Move the following to the Trash and restart.


Close all running apps. Put the following items in the trash:


1) In the ~/Library/ folder, put the Caches folder in the trash.


2) In the ~/Library/Application Support/ folder, put the folder iCloud in the trash.


3) In the ~/Library/Preferences/ folder, put the file MobileMeAccounts.plist in the trash.


Learned from Kurt Lang

Jul 20, 2017 3:28 PM in response to Eric Root

After finally calling support and telling me to reinstall my OS, this problem persisted! Needless to say I was very upset.
So now after another month of no iCloud or iMessages on this Mac I decided to search Apple again and found this thread! THANKS!! it worked after deleting my MobileMeAccounts.plist. Support had me delete all my keychain passwords so that after the OS reinstall I was entering all those usernames and passwords again. Such waste of my life!!
Totally frustrated i just used time machine and restored all those files too.


Moral of the story, You guys are the backbone of Apple as their support department really *****.

"iCloud... I'm Already Signed In!" Stop with the "This iMac can't connect to iCloud... Open iCloud preferences to fix this problem."

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