I have several hundred expired certificates starting with com.apple.idms.appleid.prd. What are they and are they safe to delete? I recently looked at Keychain Access and found that I have 394 certificates prefixed with com.apple.idms.appleid.prd, all of which are expired.



When I get more info on one of them, I see that it is from the Apple Certification Authority.



What are these certificates? Why do I have so many of them?

I tried to delete them and got this scary warning:



Unfortunately, I am not certain that I no longer need the selected key. So I'd like to ask: will I be needing the hundreds of expired keys, and is it safe to delete them?
Expired certificates can be safely deleted.

They were likely generated as a result of a problem authenticating with iCloud.