Here's something that El Cap added (although most likely something many will not want to activate). ...Auto hide Menu Bar (default setting is Off)
Here's a link to MacObserver about activating Hide Menu Bar
This is something I've wanted because my Desktop (Sys Pref) is set to randomly rotate, every 5 minutes, desktop pictures from my Pictures folder, which has about 100 high resolution, landscape photos (and I periodically update from InterfaceLIFT
). I'm very visual and every since Apple allowed greater control of Desktop views, I've kept my Desktop clear (no files / folders - except my Time Machine icon) since I really want to enjoy a clean view of the high res photos. My MBP is connected to a 24" Cinema Display, which enhances my Desktop view. [I've been auto hiding the Dock for a long time.]
Prior to El Cap, I wanted the ability to get the Menu Bar visually out of the way. ...Now, I can do so. When needed, simply moving the cursor to the top of the display screen, auto shows the Menu Bar, making it easily accessible.
Back in the day when ResEdit existed (especially, OS 9 days), I enjoyed the customization one could do. (It was fun and created a personal identity with one's Mac.) ResEdit's customizing was lost with OS X, but OS X allowed having beautiful pictures rotating periodically on the Desktop, creating a multimedia feel. So now with Auto Hide Menu Bar, I enjoy seeing my desktop pictures without the visual interruption of the Finder.