A couple of months ago, my Mac Book Pro wouldn't start up - it would make it halfway through and then power down. I took it to the repair store, and they said the hard drive was broken, and they needed to replace it. (Interestingly, they were able to transfer everything in my Applications/ folder to the new hard drive, and that was actually 85% of my content.)

Now, my computer is having problems booting again. Sometimes it takes a long time, sometimes it doesn't finish booting at all. I was able to boot it into safe mode, and it seems to be working alright right now. What steps should I take now to deal with this problem and not make it any worse?

  • The first thing I'd do is use Apple Hardware Test or Apple Diagnostics, whichever is appropriate, to thoroughly test the hardware. Jan 2 '16 at 21:26
  • @user3439894 I am in safe mode right now, and I can't even open Finder or System Preferences. Is that normal? Finder just started to open after 2 minutes.
    – geokavel
    Jan 3 '16 at 2:35
  • @user3439894 ok, extended testing just finished. No problems found.
    – geokavel
    Jan 3 '16 at 3:25
  • Running "Repair" in Disk Utility was also successful, but did not fix the problem.
    – geokavel
    Jan 3 '16 at 4:06
  • If it works in Safe Boot, try making a new admin account & booting to that.
    – Tetsujin
    Jan 3 '16 at 10:43

Turns out, the bracket cable is broken. Nothing is wrong with the hard drive.

  • Buy an external hard drive for a time machine backup to be safer for the future.
    – orkoden
    Jan 6 '16 at 10:19

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