iMac (Late 2014) Won't reboot
I have foolishly updated my iMac 2014 to OS High Sierra and now I cannot get it to boot up. I have accessed Internet Recovery Mode numerous times by holding down the (Command+R) keys during start-up. From the Disk Utility I can see that my Internal Disk (1 TB APPLE HDD ST1000LM024 Media) "appears to be OK" and likely just won't start because it is now attempting to run the updated, incompatible OS. The partition directly below it (disk0s2) is currently "Not mounted" and I cannot perform any First Aid options or Restore it (it is slightly greyed out). {update: I can Restore it but I am unsure of what should go into Source and Destination. I am tempted to use "Source: disk0s2" and "Destination: 1 TB APPLE HDD ST1000LM024 Media" as that seems like it will work but I really don't want to accidentally delete any files I have on this computer}
Currently, when attempting to Reinstall OS X, I get to the screen that prompts me to "Select the disk where you want to install OS X" and there is no disk to select. I am wondering if there is any way for me to reinstall a MacOS compatible with my iMac without erasing my current unmounted disk? I understand that will erase all my data and I have nothing backed up. In fact I just moved all my files from my MacBook to this iMac because it has more space. I've read around and it seems like its possible to move the data on my current unmounted disk to a new partition and use that partition to reinstall OS X? I am completely unknowledgeable on this and would really appreciate some help.
Again, iMac will boot into internet recovery but there is no drive for me to reinstall OS X on. I would like to keep my data but understand that's not very likely. I have negative money lol. Thank you
