Copying login keychains between Macs fails on Secure Enclave Macs with Tahoe
Users attempting to duplicate their login keychains from one Mac to another encounter failures on machines equipped with Secure Enclave hardware using the Tahoe architecture. The problem stems from incompatibilities in how the Secure Enclave encrypts and stores keychain data, preventing successful transfer. Affected devices include recent MacBook Pro and iMac models, and developers are investigating workarounds.