# dispatch_queue_priority_t The execution priority for tasks in a global concurrent queue. ``` typedef long dispatch_queue_priority_t; ``` ## Discussion In macOS 10.10 and later, use quality-of-service (QoS) classes to specify the priority of tasks instead. ## Topics ### Priorities [`DISPATCH_QUEUE_PRIORITY_HIGH`](/documentation/Dispatch/DISPATCH_QUEUE_PRIORITY_HIGH) Tasks run at the highest priority, which is equivalent to the user-initiated quality-of-service level. [`DISPATCH_QUEUE_PRIORITY_DEFAULT`](/documentation/Dispatch/DISPATCH_QUEUE_PRIORITY_DEFAULT) Tasks run at the default priority, which is equivalent to the default quality-of-service. [`DISPATCH_QUEUE_PRIORITY_LOW`](/documentation/Dispatch/DISPATCH_QUEUE_PRIORITY_LOW) Tasks run at a low priority, which is equivalent to the utility quality-of-service level. [`DISPATCH_QUEUE_PRIORITY_BACKGROUND`](/documentation/Dispatch/DISPATCH_QUEUE_PRIORITY_BACKGROUND) Tasks run at the background priority, which is equivalent to the background quality-of-service level. --- 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)