Apologies for myself, I'm a new member and clueless about Macs in general.
I have inherited a 2010 Macbook Pro and I've been hoping to use it for some light work.
The old password to the computer was lost so I figured I would just reinstall the OS. I don't have any install disks so I booted into Internet Recovery.
The High Sierra installation seemed to be going good, but about halfway through the installation, it would restart and give me the question mark folder.
I booted into disk manager and noticed the hard drive was not showing up. After a bit of research I saw that the hard drive cables were notorious for failing, so I ordered a new one and put it in along with an SSD I had laying around. I went back into disk manager but the drive still won't show up. Fair enough, I figured maybe the SSD wasn't compatible(?) so I put the original drive back in. After booting to internet recovery, it displays a loading bar, then when it finishes, it restarts and boots to the question mark folder, never going into the recovery menu.
I figured now my only option was to install the OS on an external drive. I tried the original drive in an enclosure and it would finally show up in disk manager, but after formatting it, the installer tells me the computer is "missing a firmware partition" A little more research tells me I need the firmware partition to be on an internal drive, which the computer cannot read.
I'm at a loss, I understand why the computer needs the firmware to be on an internal drive but I feel there's got to be a way for me to at least get an OS up and running so I can test the computer a little better.
Thanks so much for any suggestions!
EDIT: I feel like a dope, I chose the APFS option when formatting and I think it's now able to install to the external drive. Not sure what the issue is with reading the internal drive still.