How to: Set any picture as your profile picture on Mac OS

For the longest time, I had been annoyed that I was unable to set a custom image as my profile image in Mac OS X. After all, it’s my machine, and it’s a fairly basic function; I should be able to simply browse to it. As it turns out, you can’t simply browse to it. You are left with two choices: Use one of the default images, or drag and drop an image into the image box in Users & Groups. Here’s how:
 

• Open System Preferences
• Open Users & Groups (the first entry on the System line)
• In Finder, find the image you want
• Drag it into the profile picture box

 
Once you’ve done that, you will need to crop it, and then you’re done!