I was on El Capitan 10.11.4 and just updated to 10.11.5. Now the menu bar is missing on my second screen which is an enormous pain in the apple.
I have tried:
- Searching Google and AskDifferent and wading through many answers for much older OSX versions that no longer are relavent
- Rebooting
- Confirming that it's not just my display setup hiding the menu bar above the visible area
- Moving different apps into the second screen
- Turning off and on the System Preferences > General > Automatically hide and show the menu bar setting
- Turning on mirroring and then turning it off
- Killing and relaunching Finder
- Petitioning the ghost of Steve Jobs for help