Occasionally when I am working and put my MacBook to sleep, when I wake it up again, I am unable to switch to apps that I have had open in full screen. Similarly, if I open an app after sleep, switch to full screen mode and then command-tab to another application, I cannot return the full screen app.
Mission Control ceases to operate and gestures for switching (multi-finger swipes up to Exposé and to the side for screen switching) also fail.
The only fix I have found is a full restart.
My setup is as follows:
- MacBook Pro 15" Retina Early 2013
- 2.7 GHz Intel Core i7
- 16 GB RAM
- OS X Yosemite 10.10.4 (14E17e)
- Built-in screen and external monitor
- Apple Magic Trackpad (issue also present with built-in trackpad)
The issue presents itself sporadically and has been present for at least the last few Yosemite releases.
Any help would be very well received :-)