macOS Tahoe 26.4 update stops you from copying your login Keychain

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.