Privacy & safety · Accounts, passwords and keys
Why do I have to re-enter my account details on a new Mac?
Short answer: Your saved secrets and some private settings are encrypted so only the original Mac can read them. A copy on another computer is unreadable by design, so a new Mac asks you to enter them again.
Because your saved secrets and a few private settings are encrypted so that only the Mac they were saved on can read them. That's deliberate: a copy of the file on another computer — or in someone else's hands — is unreadable.
Reinstalling on the same Mac restores everything cleanly. On a different Mac, Storage Studio simply asks you to enter those details again.