Apple released the latest version of OS X its called El Capitan an odd name but there are making some bold claims for this minor OS update.
The big thing for graphic users is Metal a new API layer to access the graphics card. Apple claim 40-60% speed improvement and Adobe after testing an optimised version of Photoshop are backing that claim.
I will not be risking my work machine until OS 10.11.1 is released but I may upgrade my laptop this weekend and test all my apps.
I cannot risk breaking printing, screen calibrating software and my Wacom tablet. So testing on another machine or cloning your hard drive and testing on a spare is always a good idea.