High Sierra install stuck at boot showing circle with slash icon with regular flashes of the Apple logo in loop.

Yes it is a scenario posted here.

Boot into Recovery run the DiskUtility>First Aid on your Macintosh HD

http://support.apple.com/kb/HT4718

If errors are reported or repaired run it again until it reports no errors found.

You can try the install again. Always good to have a current backup plan in place.

https://discussions.apple.com/docs/DOC-10081

Disk repair using Control+r worked. Yay

Well your MBP is not included in the list, OWC has had some issues with Aura and High Sierra. I believe the MBAirs/MP use the PCIe form factor. Suspiciously it is a firmware problem and maybe worth bringing it up with their Support.

A Note on High Sierra Compatibility with Third Party SSDs | Other World Computing Blog

Still having problem here. Ran disk repair found no problems. Running Mac mini with Apple installed Ssd (250gb) First did an upgrade from Sierra. That failed. Ended in black screen with no smoking symbol. Then created bootable install thumb and did a fresh install. I couldn’t format my drive as APFS standard. Kept getting error until I did APFS (case sensitive). Installed High Sierra. Worked. All was well. An update showed up so I applied it and restarted and now I’m getting the black screen with no smoking sign again (intermittent Apple logo shows up.)

Macbook Pro Mid 2012 8GB with upgraded OWC 480 Aura SSD . . . machine died completely with “file folder-question mark” Emergency Restore with Command-R, Disk Utility says corrupted EFI, it repaired it. Did the restart. It was OK, then machine did the quicksand on the screen, leading to my choice of a hard reboot, then “circle-with-slash”, several 12 minutes with the Apple logo with progress bar . . . Finelly login screen. Very strange . . .

I did this. OWC has generally been helpful in the past. They are aware of the EFI firmware issue. In my case, I upgraded because my data exceeded my drive size. I repurposed the 256gb that came with my MBP into an external USB drive. As it turns out the suggested solution involves loading High Sierra onto this "original" SSD drive? Can you imagine having to tell this to a customer? It sounds like . . . this issue may be impacting many SSD's. I'm sure Apple isn't interested in this becoming an issue. I could tell from the conversation with the supplier they are worried about or appearing to point the finger at anyone . . . so . . . I wait until Apple, OWC or both to send a remedy or put out a statement. This has caused my machine to freeze repeatedly, now 4 times. . . Since I use mine for a work, I actually thought to myself, "I can no longer trust my machine". I may have to buy a new one . . . honest frustration.

This worked!