Macbook 11,1 SSD socket not working. How to upgrade to High sierra?

[anilmahato82]

My Macbook pro SSD socket on the logic board is not working. This I confirmed by trying to install a brand new SSD. The new SSD installed is not shown in Diskutil.
Old SSD I put in the Envoy Pro enclosure and it is working fine.

My current OS is MacOS Sierra (10.12.6).

Is there a method by which I can install MacOS high sierra and then upgrade to MacOS Mojave?

Because if I try to update my OS to high sierra or Mojave I get an error stating that EFI partition required is missing.

 

[treekram]

What new SSD do you have? The Apple SSD will work with Sierra, as will the OWC Aura and the Samsung (or other) AHCI drives. If you have the Aura Pro X, you need High Sierra or later. Non-Apple NVMe drives will work with Sierra with an adapter provided it can be formatted to a 4K block size. If you're using Sierra either on an external disk or or the installer, it won't see any of these SSD's.

In order to update to High Sierra or Mojave, it looks like you need a firmware update and in order to do that, you need an EFI partition on the internal SSD. Also, if you're trying to update an OWC Aura Pro, it had problems (fixed with a firmware update) with doing an update to High Sierra.
https://apple.stackexchange.com/que...ra-on-owc-aura-ssd-missing-firmware-partition

If you do a diskutil on the internal disk that you are trying to do the update to High Sierra or Mojave, you should see something like
0: GUID_partition_scheme ...
1: EFI EFI ...
2: Apple_HFS [Volume name] ...

If you don't have the double EFI EFI, then that's probably the cause of the message you're getting.

 

[anilmahato82]

The problem is my SSD socket is not working. Any SSD I put in that is not being read. Original Macbook pro SSD is there with me. But the moment I put it in the SSD socket. Diskutil doesn't show any drives.

Can MacOS high sierra be installed without any internal SSD?

 

[treekram]

So you have the your original Apple SSD and it does not work in the MBP but it works externally? If you are trying some other SSD, tell us what that is.

My understanding is that the firmware update for High Sierra or Mojave will not install unless there is an internal disk. If the connection to the SSD is not working, you can try a manual firmware update. There's some information in this link:
https://apple.stackexchange.com/questions/301454/applying-mac-firmware-updates-manually

You would need to run the script in the link. I don't know if the script in this link works and you should do more research before running this or trying some other method to do a manual EFI firmware update.