Hey,
I don't want to create a new topic so I will join here asking for help. I bought a used MBA 2017 13" Mac was without disk, so after some search the net I bought:
Drive: Samsung 256GB SSD NVMe PCIe 2280 MZ-VLB256B
And the adapter from Allegro offer number: 7713888598
I put everything together and .... I don't see the SSD in any way.
So I connected another external SSD drive and installed the system on it by the combination of shift+alt+cmd+R keys, at this moment the MBA starts up, the system boots, but it runs form external drive. I can't see the disk mounted inside. The system that has been automatically installed is SIERRA. Then I read that SIERRA doesn't support NVMe and I need to update at least to HIGH SIERRA. Following the blow, I said that I had to log in to APP STORE and download macOS Catalina (only this one is available in APP STORE). I downloaded a file wanting to upgrade my SIERRE to the latest system. I start the installer from the APP store level by clicking "open" I manage to click a few times further and I get to the disk selection window on which to install the system and I STOPED AGAIN !!
Internal SSD, of course, still isn't there. The external disk is visible, but I can't select it because I have the message: "You cannot install on this volume; the firmware partition is missing." I made a second partition on the same disk with the thought that maybe it would help - none of that. I put PENDRIVE with the thought that it will install sytem on it but have the same message on it "..firmware partition is missing". Both the partition and PENDRIVE formatted as "MAC OS EXTENDED (journaled)"
I am stuck, I admit that this is my first Mac adventure. I have been sitting and fighting this equipment for a week, but I definitely need someone's help. Maybe I'm trying to do something that can't be done? Please tell me how to run this equipment?