The good news is that upgrading to Yosemite seems to cause fewer compatibility challenges than some earlier OS X upgrades did. I’ll continue to update this article as I find out more. Now that OS X 10.10 Yosemite is available as a free upgrade from the Mac App Store, you’re probably wondering how well your Adobe software and other Mac apps will run on it. Below is a summary of various reports I’ve read on and around the web.