On Apple iMac and MacBook computers if the hard drive is failing you do not get a warning. The hard drive uses an internal program called S.M.A.R.T. to report its condition but OSX never tells you about it. A sign of a failing drive is when it takes a long time to open a program. Use one of the following trial programs to check your mac hard drive for failure. If the program shows bad sectors call us and we can duplicate your bad drive onto a new one and save your data.
Voltan Smart Utility
Core Code SMARTReporter