OS X Troubleshooting (Yosemite Edition)

No computer provides a trouble-free experience. This handy guide walks you through ways to diagnose, fix, and prevent the most common Mac hardware, software, and operating system problems. You'll learn how to handle problems confidently by using a systematic, iterative process and an array of built-in tools.

• Use startup commands, safe mode, and verbose mode to troubleshoot issues that occur before you log in.
• Degunk your Mac by resetting non-volatile memory and the system management contro...