I have a MacBook Pro Retina 2014 with a bad hard drive and recently found out that I can use a PCIe m2 SSD with it on macOS High Sierra.
I purchased a Samsung EVO 970 and an adapter to use in the internal Mac SSD slot. I also have a PCIe m2 to USB enclosure that I used to first allocate a FAT32 partition on the drive. I also made a bootable USB macOS High Sierra install disk using a virtual Mac. Now I have the EVO 970 installed in my Mac and the boot drive. The boot drive boots to a Utilities screen with options to install macOS etc.
I formatted the EVO 970 installed in the Mac as a Mac OS Extended (Journaled) disk with the GUID Partition Map scheme. I then proceeded to use the Install macOS option, but I am unable to click on the 970 EVO drive because it says I am missing firmware for this drive.
I have not updated this Mac past Mac OS X El Capitan before and I am trying to install macOS High Sierra so my Mac will boot from the new SSD.
What am I doing wrong?