public static NSImage ScaleImageSquare(NSImage sourceImage, int size)
{
var newSize = new SizeF(size, size);
var newImage = new NSImage(newSize);
newImage.LockFocus();
sourceImage.Size = newSize;
NSGraphicsContext.CurrentContext.ImageInterpolation = NSImageInterpolation.High;
sourceImage.DrawInRect(new RectangleF(0, 0, size, size), new RectangleF(), NSCompositingOperation.Copy, 1);
//sourceImage.Draw(new PointF(), new RectangleF(0, 0, newSize.Width, newSize.Height), NSCompositingOperation.Copy, 1);
newImage.UnlockFocus();
return newImage;
}