swift-concurrency-6-2

Migrate Swift apps to MainActor-safe concurrency by adopting single-threaded defaults and isolated conformances, which prevents data races by ensuring safe protocol adoption for MainActor-based types.

Approable concurrency in Swift establishes single-threaded execution by default while offloading CPU-intensive background tasks explicitly using the @concurrent attribute, avoiding implicit data races.

Yes, you can selectively offload CPU-intensive tasks in Swift 6.2 by applying the explicit @concurrent attribute, keeping the default execution single-threaded and race-free.

The best way to reduce MainActor boilerplate is enabling MainActor default inference mode, which automatically applies isolation to app targets and minimizes repetitive concurrency declarations.

Implicit actor isolation causes data races during Swift migration because automatic background offloading creates unsynchronized access, whereas explicit single-threaded defaults with isolated conformances secure data access.

You should not use MainActor default inference when your Swift project requires parallel work across multiple threads, as it enforces single-threaded defaults that restrict concurrent execution.