Tinting a grayscale NSImage (or CIImage)

The above solution didn’t work for me. But this much easier solution works great for me

- (NSImage *)imageTintedWithColor:(NSColor *)tint
{
    NSImage *image = [self copy];
    if (tint) {
        [image lockFocus];
        [tint set];
        NSRect imageRect = {NSZeroPoint, [image size]};
        NSRectFillUsingOperation(imageRect, NSCompositeSourceIn);
        [image unlockFocus];
    }
    return image;
}