Things can and do go wrong. A simple reset to your system is often the best way to “cure” software problems. Don’t just click Restart, however; let the system fully reset itself by shutting down. As a favorite engineer used to tell me, “Shut down, count to 20, restart—if there’s still a problem, then call me.”
Like this tip? It comes from the book
Final Cut Studio On the Spot from Focal Press.
When in Doubt, Shut Down and Restart
in Apple