Manage device access
Open Settings ▸ Remote control to review paired devices and their granted capabilities. Each row names the device and shows its tier, the date it paired, and when it was last seen. A row marked paired under a different account belongs to a grant the Mac's current account can't honor; that device can't connect until it pairs again.
Revoking
Revoke a device when it is lost, replaced, or no longer needs access. Revocation takes effect on its next request and removes push subscriptions owned by that grant.
Forget all paired devices revokes every grant at once, drops any pairing requests still waiting for an answer, and mints a fresh pairing code.
Signing out on the Mac also refuses every paired device on its next request. Turning remote control off closes the relay connection, so no device can reach the Mac while it is off.
Pairing a device again creates a new grant. Old tokens are not revived.
Keychain warnings
Grants, the Mac's remote identity, and push subscriptions live in the login Keychain. When one of them couldn't be saved there, the pane says so in a warning row: the pairing or subscription works for this session and is gone when Saggar quits. A Keychain problem is the usual reason every device drops off the list at once after a relaunch.