FWIW: I upgraded to 15.0.1, and I use Keychain Access a lot (for selected keys/passwords, I only keep them on my primary machine, not in the cloud, and in some cases I put certain keys on a separate keychain protected with a different password).
So I tried looking at Keychain Access on a secondary machine that was just upgraded to 15.0.1 (I'm keeping my primary machine on Sonoma for now). Looking at Keychain Access -> left pane "login" and "iCloud" keychains, if I select -> All Items I see lots of stuff. If I select "My Certificates" or "Certificates", however, there is nothing. I don't dig into certificates much so I don't know if things disappeared. I also looked at "System Keychains" for "System" and "System Roots" and there are certificates in there.
Maybe if you could specify where you expected to see the certificates: did you add them to My Certificates (which I find is empty) of system, system roots, login, or cloud?
Changes are happening with Keychain Access, Apple is making a transition to a newer password manager. (Must be those attempts to unify iOS and OS.) There are good reasons why we don't want certain keys, or notes or data, on all machines/devices or in the cloud. I also want to secure certain items behind another layer of password access: keychains on a local machine.
We'll have to learn a new scheme now. On Sequoia, when I was in Keychain Access:
- The item File -> New Secure Note Item" is GONE from Sequoia.
- I went to File -> New Password, the popup dialog appeared below, asking to use "Manage your passwords in the new password app? : Open Passwords, or Continue." Sigh. Leaning curve ahead.
