I'm not sure exactly what happened but I was using my iMac (Late 2015 model) with 3TB fusion drive, and then when loading apps I get this beachball that wont go away. So I had no choice but to press the power button to shut it down and upon restarting my iMac I get a screen with the circle with a line going through it. So I went online to research what it was and they said that the machine can't find a valid System folder. So I rebooted into Recover mode and went into disk utility and saw that my Macintosh HD was in red so I clicked on it and it asked me to Fix or Ignore, so I clicked fix. Not knowing that it would erase all my data. Did I just lose everything or is my data still there somewhere? I even tried to erase my drive to reinstall Mac OS and at the very last minute or so it gives me an error saying cannot prepare installation. So at this moment, my main concern is recovering my data off my Fusion drive. Is there any software or utils that will let me do this. I heard even if you erase/reformat your HDD, that the data is still there, since it technically never gets written over. I would like to recover my pictures, documents and music, as those are the most important. But I feel like I lost my entire life now. Sorry for the rant, I feel so terrible. Please help me get my stuff back somehow. I hope it's not too late.