Apple supplies various alternate boot modes for OS X, but sometimes systems get stuck in them.
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The recent OS X 10.9.2 update fixes a persistent Safe Mode bug for some, but there are alternative approaches to this issue for those still affected.
A new firmware update for the Mac Pro fixes USB connectivity and Power Nap issues.
Accessing the boot menu in OS X is a simple key press, though in some cases it requires specific timing in order to work.
If your system hangs when going into Safe Mode, or will not load into Safe Mode at all, there are a couple of things you can do to fix the situation.
Now that the Xbox One and PS4 have been reviewed, it's time to break down the scorecard and see why CNET gave the higher mark to the PS4.
The boot drive's format and partition structure can be checked both in the OS X graphical interface and in the Terminal.