I've been reviewing my Keychain recently via Keychain Access. (I do not use iCloud Keychain as I use 1PW.)
While I'm not having any noticeable issues with my Keychain, I do see a variety of multiple items - particularly in the Keys section where there are Public & Private keys, particularly for iMessage Signing & Encryption Keys (which seemingly should now be Messages) where the Kind & Usage details are the same.
In the Passwords category, there also a number having the same Name albeit their Account & Where details are slightly different.
1. Short of deleting my complete Keychain to start over, where can one find detail about what might be redundant (say, from prior Keychains as OS X updates have been done over time) and therefore, safely deleted to do a clean up.
2. Also when I run Keychain First Aid (Verify) and the Keychain is unlocked, I'm getting the following in the First Aid window and then, the Keychain locks upon completion of the Verify:
Checking keychain configuration for "name" (user ID=501)
Home directory is /Users/"name"
Checked login keychain
Checked settings for ~/Library/Keychains/login.keychain
Keychain can't be unlocked automatically. Please attempt to unlock ~/Library/Keychains/login.keychain from Keychain Access.
Checked default keychain
Checked contents of ~/Library/Keychains/login.keychain
No problems found
This behavior doesn't seem correct. ...Is something happening which further indicates there are some gremlins in my Keychain?
MBP15 i7 (2017) - 1TB PCIe-SSD - 10.15.6, iPhone X & iPadPro 11 WiFi, Watch4