iCloud preferences error - unable to fix
Hello,
I have an iCloud issue I hope you can help me with.
I am signed into iCloud, but I keep getting the following error:
Preferences Error: There was an error in iCloud preferences.
I'm unable to sign out as it keeps returning this error. I can't access the App Store to try to upgrade, presumably because of the error.
I am running OS X 10.12.6 on a Mid 2011 iMac.
Would appreciate any advice to try to resolve this. Thanks in advance.