Apple's changes to the Keychain in macOS Tahoe made it more secure. However, by binding it to device-specific Secure Enclave keys, users now can't manually copy the login Keychain and use it on another Mac.


Password versioning in Apple Passwords
Attacks on Mac users are getting more sophisticated over time, with AI also opening the door to even more malware and the discovery of new intrusion techniques. While Apple does work to increase the security of its operating systems and software to counter the threats, they can also become a burden to administrators.

In a blog post on September 8, Rich Trouton wrote that it wasn't possible to manually copy login Keychain files from one Mac to another. At least, doing so and still being able to use them on the new machine.


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