(adsbygoogle = window.adsbygoogle || []).push({}); 2012 macbook pro, i used the auto shutdown feature to shut down my mac after a download had finished. i also theb scheduled it to turn on, however this feature doesnt seem to work properly, the auto turn on only makes the startup noise and shows no display. during this, i manually turned off my mac v(holding power buttonb) today, i came to turn my mac on and i get the grey progress bar and spinnjng gear. after about 5 minutes, it shuts down and does nothing. i went into the diagnostics (d button at startup) and it said there was nothing wrong. i also tried going into safe mode, but to no avail (shift at startup), i then tried shift + cmd + v, which seemed to repeat the loading of safe mode, then after about 5 minutes it would shut down and do nothing. as it is a mid 2012 model, it came with no boot disc. im looking to fox this problem and keep al my files. edit: i also did reset the nvram and pram, but to no avail either. (sorry about errors, i quickly typed this up on my phone)

sometimes this spinning grey thing is that an update is being installed, try to turn off, and then, when turning on, hold the power button until you hear a bip, then release it.. if doesn't work, I try to contact my father, he works with macintosh computers since 90's, plz reply

sorry for my slow reply, and that didn't work either. The hard drive needs to be repaired via disk utility, so I'm waiting on an external hard drive so I can back it up, then zero erase the internal one, then restore my backed up files. I'll post back in a day or two with results.

I completely fixed it. I have all my old files on it, without an issue as of yet.

All I did was buy a 500GB TOSHIBA external hard drive from PCWorld/Currys (£44.99), and within Disk Utility, I formatted it to Mac OSX (Journaled); then it allowed me to transfer all my files, apps, settings etc over onto the external hard drive. Once done (took about 2 hours to backup), I zero erased my internal Macbook Pro's hard drive, then restarted the computer. It automatically went into Disk Utility, and so I clicked "Install OSX Lion" or something similar to that; it downloaded for about 7-8 hours (my internet speed is shockingly awful). Once done, it asked me to create a new account, as if it was a brand new Macbook Pro. Once I logged in, I went into Migration Assistant, and it found the external hard drive (which I backed up before) perfectly fine. It started transferring all my previous files, apps, settings etc back over. This took about an hour or so. Once done, I could log in to my old Macbook user (before any of these errors happened), and then delete the account which we created after re-installing OSX. Once that's done, congrats, you're back to normal!

I'm not too sure what actually caused the OS to be corrupt, but I'm assuming it either has something to do with Auto-Turn on, or Loginox (an app which changed the login screen).

If anyone's had the same problem as me, this is your solution