Can't display iCloud System Preferences pane

I've got this same issue. I have no idea what I did (if aything) to get it to come back up.

I still can't sign in or out, and my iCloud is completely messed up with this beta.

I'll have to file a radar.

Same for me. I was forced to change my password by the developer membercenter.

Since then I can't open the iCloud preference pane.

I tried to work around by accessing the iCloud preference through the Internetaccounts Preference Pane but it hangs up this way too.

I have the same issue. The pref panel doesn't load at all.

same here

I was seeing the same problem. I was able to open the accounts tab in Messages and update the password there. It seems has if Apple has then pushed the new password system wide, as I am no longer getting the error message that my Mac couldn't connect to iCloud. Hope that works for everyone else too!

I was able to log in through imessage as well, but it isnt syncing my iCloud contacts.

That appears to be the case for as well, now that you mention it.

I only really use iCloud for Messages, Contacts, and Calendar. Messages seems to be separate so that works, but no Contacts or Calendar, Calendar is the biggest hiccup. I don't change my contacts too often. I'm assuming something like this would be fixed in the Beta 2, seeing that its affecting almost everyone.

I have this same issue.

I was fourced to change my passpord when logging in to the Developers page. Now I can't seen to get into my setting to change the password for my icloud on my mac. The application just keep freezing.

I had this exact problem too. I solved it by deleting all files from the following folder:

/Users/<MY HOME FOLDER>/Library/Application Support/iCloud/Accounts

I was then able to get into the iCloud preference pane, where it asked me for my new password. After giving it, all was working again.

FWIW, I deleted the files while running OS X from another partition, but that was probably not essential.

[Edit]: Based on responses to this, it is necessary to reboot after deleting the files.

This worked for me, I was able to log into my own profile, delete these files and reboot, then the preferences pane worked going forward.

Happened to me after I was forced to change my password.

Same here.

Have you tried the fix I suggest below?

Have you tried the fix I suggest below?

This worked for me as well. Thank you

This worked great thanks NOTE TO ALL, MAKE SURE TO SHOW YOUR HIDDIN FOLDERS TO DO THIS

Kinda wish I'd have seen this earlier. I ended up doing a fresh install after backing up all my files. Seemed to have worked, not having any problems with it now.