In this post I’m going to show you the quickest way that I’ve found to to turn a photo into black and white and leave one element in color, on a Mac.

Step 1: Turn the photo into black and white by pressing, Command + Shift + U.
Step 2: Determine the element that you want to change to color.
Step 3: Select the Eraser tool  and ‘erase’ the element that you want to appear in color.