QueueThreads

QueueThreads.swift

import Cocoa

class ViewController: NSViewController {
    var queue = DispatchQueue(label: "Queue", qos: .background, attributes: .concurrent)

    override func viewDidLoad() {
        super.viewDidLoad()

        (0..<1000).forEach { i in self.queue.async { Thread.sleep(forTimeInterval: 30.0) } }
    }
}