Simple progress bar control in Swift for macOS
progressBar.color = NSColor(calibratedRed: 0.1, green: 0.1, blue: 0.8, alpha: 0.6)
progressBar.backgroundColor = NSColor.lightGrayColor()
// for indeterminate state
progressBar.animationColor = NSColor.whiteColor()
RTProgressBar is available under the MIT license. See the LICENSE file for more info.