Is it possible to recover my bootcamp and reinstall OSX?

Macbook Pro 15” Late 2013 2.3Ghz. It was stupid of me to take this so lightly. I had a small partition that I had made in my boot camp windows 8.1 that I wasn’t using. So I used mini partition tool to merge that and the bootcamp drive, it asked me to restart and I did. Well it completed the process and rebooted, but it doesn’t load up. The initial music plays and then it plays a a very tiny clip of that music and stays stuck on a black screen with no errors; sort of like when a game freezes and the music clips and loops.

So then I forced a reboot with the powerbutton. Still the same. Then I held down option after booting. To my surprised it only showed Recovery and Bootcamp options. If I select bootcamp, the above explained situation happens.

I selected recovery and went into disk utility. It only showed disk02, recovery HD, bootcamp and under disk 1 OSX Base System. I’ll attach an image. The 02 and Bootcamp are greyed out. I cannot mount them. I cannot erase them.

At one point when I clicked verify on 02, it gave an error “Unable to repair while live”. I felt positive then went to try and do a reinstall of OS X, but can’t select that drive because it’s in MS-DOS(FAT32) format. So I went back and now the drive is greyed out again. Verifying and repairing gives errors, and can’t be mounted.

I tried fsck fy in singleuser mode but it gave a command not found error.

When I click the 02 and bootcamp drives, they only show capacity now, and “-“ all other info.

What can I do to resolve this? Is there anyway the files are still there? I was hoping maybe I could reinstall OSX then repair the Bootcamp drive some how. What are my options?

Edit: I did an NVRAM reset and now it shows disk0s2 as Mac OS Extended Format.

Edit: I tried to do a repair after and it gave the error “Disk utility can’t repair this disk...disk, and restore your backed-up files”. Not sure why it said disk twice.

Update: 09/11/2021

Alright so none of my attempts at erasing or unmounting disk0s2 worked. I have been attempting to reinstall macOS X on it and it was getting stuck at a certain point.

I created a bootdrive with high sierra as I got recommended to do so on another forum since OS X Mavericks is really old even though that was what was last installed on it. I tried booting through it and force unmounting and erasing disk0s2 (diskutil eraseVolume and diskutil unmountDiskforce JHFS+) before install but in both cases it failed at the unmounting part. When I run verify/repair it goes through without issues the last time I ran. I am just unable to unmount. I tried the lsof |grep disk0 command to see if there are any process running, but it doesn’t give me a response, nothing happens; no errors or a response, but it does run the command because if I try to quit terminal it tells me so. Maybe I am doing something wrong.

So after that didn’t work, I said screw it and just tried to install sierra using the bootdrive and launched it. It starts installing and gets stuck at 2 minutes remaining, around 85% of the way through. I had to force restart due to that a few times; even if I let it continue it seems to get stuck at 18minutes remaining, around 5% of the way through. Some files are getting written because I see the capacity of the drive being reduced when I relaunch into Utility menu. However it doesn’t necessarily increase each time that I have noticed, only when attempting both this and the below method did the Used amount increase from what I noticed.

When I go through internet recovery, it downloads mavericks 10.9 for me and attempts to install. It downloads and goes through the installation. Then it finishes, goes into a grey screen(pic below)with a loading circle for quite some time, and restarts but ends up hanging when it does where it’s stuck on a semi white screen with a loading circle showing it’s loading. I am sleep deprived so fell asleep while waiting the last time and even after 4 hours or so it was still stuck there. The fileis getting downloaded as there is a change in drive capacity. As of now it’s used around 11 GB where as it was pretty much empty before any of these operations.

(grey screen)

So since even that didn’t work, I thought maybe I could reformat the drive I was using for booting then try installing macOS X on that to see if I can get into it and recover my files(at least some of the important ones). So I got into internet recovery and did that. Just like above it goes into the grey screen with loading icon, then restarts and hangs on a white screen with a loading circle.

At the moment I restarted and ran the OS C installer for Mavericks by booting into the Options menu. The install completed in about 20 minutes and now it’s stuck on the grey screen before restarting. I am going to let it be longer and see if it restarts; if not I’ll have to force it again.

If that happens, I’ll post a diskutil list because there are multiple disks for some reason and some and really tiny. My biggest issue here is trying to recover bootcamp files. Could the unmounting failure be because my Recovery HD is in the same disk as the disk0s2? Or is this some kind of a permission issue?

Update:

Alright so I had to force restart, and gladly it showed the external as MacOS X. I launched it and it boot into MacOS X Maverick. I am currently recovering files in boot camp using disk drill. However I am still unable to erase my disk0s2. It still gives the unable to dismount error. How can I circumvent this?