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If you’re asked for access to your keychain on Mac
When you connect to an app, server or other item that’s protected by a password, the item tries to retrieve the password from your keychain. Keychain Access requests your permission to provide the password to the app or server.
Choose one of the following options:
Allow Once: Grant access this time only. You’ll be asked again the next time the app or server needs the password.
Always Allow: Let the app or server retrieve the password from your keychain without any further authorisation or notice from you.
Deny: Prevent the app or server from retrieving the password from your keychain. You need to enter the password manually.
See alsoWhat is Keychain Access on Mac?