I need some major help in setting my iMac up and running again. I have come to the point that I realized I have no idea what am doing and have only made things worse. To get to the point - Trying to install ML,(or mavericks which i have on a usb flash drive) from scratch, like it was new, resetting everything. what happened: ill try to make it short I apologize for the lack of evidence on everything i have done until writing this, I did not think it would turn this nasty. - installed mavericks on my 27" iMac, became slow/beachballs/freezing - created an install disk of mavericks to perform a clean install. - booted into it, formatted macintosh HD drive - installed mavericks, partially, after the initial install it gave me an error( can't recall) something about can't install on it.(i believe it was this, "install Failed: OS X could not be installed on your computer. OS X can't be installed on the disk because a recovery system can't be created.") -downhill from here- - Runs terminal to delete the Recovery drive, following some directions online. -tried to merge the now deleted recovery drive partition, now called untitled, failed. -Disk Utility, erased, verified, repaired HD. Showed everything was fine. -Tried to install ML/Mavericks, "You Cannot Install OS X on This Disk. OS X cannot start up from this disk") -Back in Disk Utility, clicked erase HD again, Estimate: 2minutes, ended on the same spot 5+ hours later, clicked skipped. -Macintosh HD became unusable, showed as faded. -Back to terminal following directions. -ran, diskutil cs list -ran, diskutil cs delete UUID(individual, failed) -ran, diskutil cs delete UUID(group, worked until the last bit) -got a null error, and error: -69832: file system formatter failed -ran, diskutil cs list - get: No CoreStorage logical volume groups found. This is where I am at now, I apologize for not having proper pictures/scripts of everything i was doing, did not think it would turn this bad. As of right now, this is how it looks: diskutil list: -bash-3.2# diskutil list /dev/disk0 #: TYPE NAME SIZE IDENTIFIER 0: Apple_partition_scheme *1.2 GB disk0 1: Apple_partition_map 30.7 KB disk0s1 2: Apple_HFS Mac OS X Base System 1.2 GB disk0s2 /dev/disk1 #: TYPE NAME SIZE IDENTIFIER 0: untitled *524.3 KB disk1 /dev/disk2 #: TYPE NAME SIZE IDENTIFIER 0: untitled *524.3 KB disk2 /dev/disk3 #: TYPE NAME SIZE IDENTIFIER 0: untitled *524.3 KB disk3 /dev/disk4 #: TYPE NAME SIZE IDENTIFIER 0: untitled *524.3 KB disk4 /dev/disk5 #: TYPE NAME SIZE IDENTIFIER 0: untitled *524.3 KB disk5 /dev/disk6 #: TYPE NAME SIZE IDENTIFIER 0: untitled *6.3 MB disk6 /dev/disk7 #: TYPE NAME SIZE IDENTIFIER 0: untitled *2.1 MB disk7 /dev/disk8 #: TYPE NAME SIZE IDENTIFIER 0: untitled *1.0 MB disk8 /dev/disk9 #: TYPE NAME SIZE IDENTIFIER 0: untitled *524.3 KB disk9 /dev/disk10 #: TYPE NAME SIZE IDENTIFIER 0: untitled *524.3 KB disk10 /dev/disk11 #: TYPE NAME SIZE IDENTIFIER 0: untitled *1.0 MB disk11 /dev/disk12 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *121.3 GB disk12 1: EFI 209.7 MB disk12s1 2: Apple_HFS Untitled 121.0 GB disk12s2 /dev/disk13 #: TYPE NAME SIZE IDENTIFIER 0: NO NAME *2.0 GB disk13 -bash-3.2# diskutil cs list No CoreStorage logical volume groups found -bash-3.2# I saved files that i cared about to an external hard drive (not through time machine, which i probably should for the future.) I didn't mind deleting everything, just wanted it to have a nice fresh install of ML or Mavericks at this point. Again sorry for this whole mess and not properly presenting it to you all. I can't seem to find an "about this mac" options currently for more details Its a 27" iMac Ordered on November 30, 2012 (slim one) 3tb fusion drive. Any help is really appreciated.