Set Up a Ghost Account

Troubleshooting Mac OS X is much easier if you create a second, “ghost” user on your Mac, with administrator privileges. Go to System Preferences> Accounts to do this. For simplicity, you may want to give it the same password as your main user.

Then, when you have a problem, log out and log back into your ghost account. If the problem is gone, you know it’s specific to your main account. This lets you limit your troubleshooting to files that could only affect one user, such as those in the ~/Library folder.

If the problem does exist for your ghost account, you know to look higher up, in the /Library and /System/Library folders.