# start(attributes:) Starts a new remote session with the specified attributes. ``` @MainActor static func start(attributes: Attributes) async throws -> RemoteMediaSession ``` ## Parameters `attributes` The attributes that configure the session. ## Return Value A remote session instance. ## Discussion This method registers a session. The attributes are encoded and sent to your app extension, which creates the actual session using your [`RemoteMediaSessionExtension`](/documentation/NowPlaying/RemoteMediaSessionExtension) conformance. > Throws: ``doc://com.apple.nowplaying/documentation/NowPlaying/RemoteMediaSessionError/internalFailure`` if the system couldn’t register > the session. Also throws an encoding error if `attributes` isn’t encodable. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)