iCloud login problem on Sierra, High Sierra? Try this.

I tried it downloading the certificate, found out there were two:

AppleISTCA2G1.cer

AppleRootCA-G2.cer

Downloaded the two, seems to be in the Certificates list but opening Notes still the wheel keeps turning. Or do I need a restart of the iMAC?

I suppose you have to go to System Preferences -> iCloud -> iCloud Drive, Press options button, re-enable Desktop & Documents Folders and anything else you need back. It should fetch info from the cloud and re-populate.

Thank you pedrocaiano for adding that solution. I had not expired yet, and hoped I wouldn't, but was nervous when you posted you did. I just looked at my keychain, and I no longer have the Apple IST CA 2-G1 in listed (if I look for it on my computer, it says it exists, but has expired), but I have other certificates that don't expire for at least another year, so I think I had already selected to always trust when I installed. I hope I am in good shape for now.

Oh thanks! In my case, not needed as I don’t use iCloud Drive but only Calendar, Notes and Contacts syncing. Anyways, I’ve reinstalled the expired one on my MBP and my iPad. I know someone who will be happy on another forum… ;)

This thread might provided a little info on the -25294 error: https://developer.apple.com/forums/thread/675290

I CANNOT thank you enough! 😀 My iCloud, iMessage especially on my older Mac running Sierra just simply stopped working out of the blue (iPhone, iPad, Watch was fine)

5 days of silly messages of "You can't sign in at this time" "Update password" prompts and "Change Password" - which I did 3 times. ALSO other sites stating deleting Accounts, SysPref, etc failed. This solved it!

Again, much much thanks!

Just curious as to how did we suddenly lost or need this certificate and all these people running Sierra/High Sierra started getting this error... Do you think it's related with the software update Apple released on April 5th and their servers?

Thank you so much for this, as the not being able to sign in was driving me round the bend.

Now all my icloud stuff is working apart from the drive - when I select icloud drive in finder its just blank??? Any idea how I get it to see the cloud and repopulate all my stuff please???

THANK YOU! I was going nuts last few days. My 2009 MacBook Pro is running on MacOS 10.12. and was thinking if this iCloud thing doesn't resolve, then it's time get a new MacBook. however, I have old version of Photoshop and Lightroom that I have so much presets on. I just can't part with this almost 13 yrs told MacBook Pro yet! THANK You for everything and I hope the cert doesn't expire in a month or so.

I had this problem too. 3 days of complete stress as every attempt I made to solve it depleted my photos library (20,000+ photos disappeared). Thanks to this solution I luckily restored my photos and iCloud Drive. Very worried about the May expiration dates as I have also pasted this certificate into my iMac running Catalina which was also locked out of iCloud. Also despite restoring the operating system on my Catalina iMac and Sierra MacBook one of my most important apps no longer works (Tascam us-16x08 Panel Settings app) just will not load at all so not sure if it’s a connected issue or not but too much of a coincidence. My iMac ended up full from iCloud storage with only 17gb free, simply locked up at almost every key stroke. Pretty sure this is apples underhand way of forcing OS and hardware upgrades, I had no certificate expiration warnings at all, very unhappy with apple (paying too whack for 2tb iCloud storage) with lousy customer support.

That's sorta BS of them. I have some Macs that I will not update because I will lose software that I use regularly and can't replace. I have other Macs that I can update. There is no reason to cut off the older computers functionality. That said, I don't use iCloud for almost anything (for good reason). I just push messages from my phone to my other devices so I don't have to carry my phone around everywhere, and it's easier to type on a computer. On some devices, that, and Find My Mac, are the ONLY reasons I need to keep them logged into my account. This certificate allows me to keep doing those two things.

from experience I now that every phone call about the same thing to apple support will result in a different answer everytime that are maybe, some time, could be, we don't know...

have you a link to the certificate good till 2025?

Are you on High Sierra (I guess the answer is yes)?

Members on MacRumors tried the two certificates workaround and it doesn't work: one not even able to log to icloud.com on Safari and the other with Notes not syncing.

In my case, Notes are syncing and I'm able to log to icloud.com (Sierra). Strange...

Tried appleistca2g1_bc.cer and it did not work.

I updated one of my machines from OSX10.13.3 to OSX10.13.6. still not working so i'm signing it out of iCloud then back on and see if that works. Is taking a long time... still waiting a few hours for it to save a copy of everything to my Mac before signing out. I'll let it run overnight.