Mac stuck in safe boot
Running the command &nbsp;&nbsp;/sbin/fsck –fy&nbsp;&nbsp; initiates a file system consistency check utility which should scan your system and attempt to repair any issues, this scan is documented to take approximately 15 minutes and should not be interrupted.



You should restart your computer, press the power button, and then immediately press and hold the&nbsp;&nbsp;Command + S&nbsp;&nbsp;keys as the computer starts up.  This will boot you into Single-user mode and you should see white text on the screen.  Now run the fsck utility and wait.

When it's done it should prompt you with the message "File System was modified" or "No problems were found".  If you see the first message, you should repeat the entire process over and over again until you receive the "No problems were found" message.  This may take 3 or more times of repeating the process.  



If after 5 times you still do not get the No problems were found prompt then your last hope is to attempt a Disk Repair.

Find a OSX install disc, and insert it, restart, holding down the&nbsp;&nbsp;C&nbsp;&nbsp;key to boot to the disc.  Once it starts up, navigate to the Disk Utility application which will be found in one of the drop down menu's along the top of the window.

Within the Disk Utility application select your drive and run the Repair Disk command.  Run it repeatedly until it responds that no errors needed to be repaired.

If it still doesn't work, buy a new hard-drive.