i am using a macbook air and with yosmite os
At first I could still switch between desktops, just that i could not swipe up/down to access mission control and app exposé. I tried typing in killall Dock into terminal to restart dock, but now i cant switch desktops either and the background is completely black. killall dock just tells me it can't find the process for this user. when i typed in killall -s dock it showed only one process.
is there a way to force dock to start and fix mission control?