Chosen Solution
Hello, TLDR I can not update the EFI firmware on my MacBook Pro laptop. Recently, The SSD in my computer broke down so I ordered a new one which is the OWC Aura Pro. After installing it in my computer it was not recognized. I found out that this drive requires a newer EFI update which can be done when updating MacOS to High Sierra (I’ve not done this before on this system). So I connected an external hard drive which had MacOS High Sierra on it and tried to install High Sierra on internal SSD. It failed because after computer restarted the internal SSD was no longer visible. So I tried to install MacOS High Sierra on another external drive just to update that EFI but it also failed because I need the internal SSD to do so (it need some ID of hardware partition on internal drive). My qestion is, is there other way to update EFI or I need to get other working internal SSD just to make this update? Or maybe there is other way to make this OWC SSD working.
The MacOS does have newer EFI firmware within it. But! The issue is not the EFI firmware but the OWC SSD’s firmware. OWC has a special firmware updater which you need to run. Here’s the info on it: Aura SSDs: Firmware Updater Tool. Now the rub! You’ll need to install the older MacOS onto the SSD first so the system works with the internal OWC drive, I’ve been using Mavericks for this task. Update the OWC firmware using the tool. Then your SSD should look like a standard internal drive vs like an external drive Icon:
Then you can upgrade the MacOS if you desire to do so.
