A while ago, Unsplash came out with this nifty MacOS Menu Bar utility app. Every day it changes out your desktop wallpaper with a random photo from the Unsplash vault. If you don’t like a day’s photo, you can easily click refresh to grab a new one.
Here’s the desktop wallpaper it served up for my iMac today:
P.S. And, speaking of Unsplash, here’s a page full of holiday and wintery images if you want to get your iPhone, iPad, et al. into the holiday spirit.