Mac OS X: "You need to restart your computer" Alert Appears

In Mac OS X 10.2 or later, the older style kernel panic message is replaced with an alert that says you need to restart your computer.
Symptom

You see this alert message:




Figure 1 A kernel panic in Mac OS X 10.2 or later


Solution

This message indicates that a kernel panic has likely occurred. To learn more, see technical document 106227, "Mac OS X: What Is a Kernel Panic?"
Published Date: Oct 10, 2016