I have no idea which keychain is in which, but the last time I migrated from one Apple laptop to another, I couldn't get the automated tool to work at all, so I restored a physical backup, went through the sign-in process, and passwords and passkeys migrated correctly.
Passwords and passkeys are in the iCloud keychain. You can technically save passwords in the login keychain (not sure about passkeys), but if you’re using the Passwords app it will be in the iCloud one.
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The iCloud keychain is separate from the login keychain. The Passwords app doesn't use the login keychain.
I have no idea which keychain is in which, but the last time I migrated from one Apple laptop to another, I couldn't get the automated tool to work at all, so I restored a physical backup, went through the sign-in process, and passwords and passkeys migrated correctly.
Passwords and passkeys are in the iCloud keychain. You can technically save passwords in the login keychain (not sure about passkeys), but if you’re using the Passwords app it will be in the iCloud one.
Even more confusing. Do we know which data is in which keychain?
Look in the Keychain Access app.