CHGenerator/Sources/Generator/Extensions/NSImage+Extensions.swift

import Foundation
import AppKit

extension NSImage {

    func scaledDown(to size: NSSize) -> NSImage {
        guard self.size.width > size.width else {
            return self
        }
        return NSImage(size: size, flipped: false) { [weak self] (resizedRect) -> Bool in
            self?.draw(in: resizedRect)
            return true
        }
    }
}