Get all available display resolutions on your machine

displayres.swift

//
//  main.swift
//  Created by grep-awesome on 6/15/15.
//

import Foundation
import CoreGraphics

var displayConfig: CGDisplayConfigRef = nil
let mainDisplayID = CGMainDisplayID()

var displayMode = CGDisplayCopyDisplayMode(mainDisplayID).takeRetainedValue()
var width = CGDisplayModeGetWidth(displayMode)
var height = CGDisplayModeGetHeight(displayMode)

print("current size: \(width)x\(height)\n")
print("available sizes:\n")

var modes = CGDisplayCopyAllDisplayModes(mainDisplayID, nil).takeRetainedValue()
let modesCount = CFArrayGetCount(modes) - 1

for i in 0...modesCount {
    var mode: CGDisplayModeRef = unsafeBitCast(CFArrayGetValueAtIndex(modes, i), CGDisplayModeRef.self)
    
    var width = CGDisplayModeGetWidth(mode)
    var height = CGDisplayModeGetHeight(mode)
    print("\t\(width)x\(height)\n")
}