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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.
While OS X includes some robust tools for troubleshooting, there are a number of third-party tools that can help tackle problems or simply give you a better understanding of how OS X functions.
The boot drive's format and partition structure can be checked both in the OS X graphical interface and in the Terminal.
There are several common ways people can verify file system integrity in OS X, including booting to Safe Mode, using Disk Utility, or running the 'fsck' tool. These options have had some people wondering which is best.
If you find a folder called Damaged Files at the root of your hard drive in OS X, it may mean nothing -- or it could be a sign that your drive is failing.
Apple supplies various alternate boot modes for OS X, but sometimes systems get stuck in them.
MacFixIt Answers is a weekly feature in which we answer questions e-mailed in by our readers. We welcome alternative approaches and views from readers and encourage you to post your own suggestions in the comments.
Sometimes applications may not perform as expected or needed, so having two on your system will allow you to use one when the other will not work.
After installing an update to OS X, one rare but possible problem might be that the directory services can become corrupted, removing account credentials, and preventing you from logging in.
MacFixIt Answers is a feature where we answer questions e-mailed to us by readers. This week, we have questions on an iMac that randomly switches off, where the theme files for Keynote are located on the hard drive, and reinstalling OS X over a damaged installation.