Elsewhere1. Sign the device out
Open your account on elsewhere.is, find the device in the list, and choose Sign out. If you can't tell which one it is, choose Sign out everywhere, then sign back in on your own devices.
Signing out stops the device from signing in again. Access it already has can last up to a day, so to cut it off at once, turn off sharing on your computers from the menu bar until you've finished these steps.
2. Secure your email
Elsewhere has no password. It signs you in with a code sent to your email, a passkey, or Sign in with Apple. If someone signed in without you, the likeliest way in was your email.
Change your email password, and turn on two-step verification for your email account.
3. Check your computers
On each Mac, the Elsewhere menu shows who is connected right now. Disconnect anything you don't recognize.
Turn on Ask on this Mac first in Sharing settings, so every new session needs a click at the Mac. Then turn sharing back on.
If you need help
Write to hello@elsewhere.is and we'll help you check your account.
Common questions
Why did I get this email when it was me?
Every new device gets one, including your own, so you always hear about a sign-in.
Does Elsewhere ever ask for my sign-in code?
Never. Anyone who has your code can sign in as you, so never share it.
Could they have seen my screen?
Only while connected to a computer with sharing on. Your Mac lists every session in its menu bar and notifies you when one starts.