Yep…straight from OWC…although the OS will install fine to an OWC SSD…the only way to get 5he firmware update is to reinstall the original…and it must be in the laptop and not an external case. This is one of their Aura Pro SSDs in a 2015 rMBP…I’m not sure whether this issue is isolated to that model or whether it’s an issue with all OWC SSDs. The problem is that you don’t know the firmware is out of date unless you run a utility that the name of escapes me right now but I’ve got it installed on the laptop and it reports out of date…and thee is no stand alone firmware updates from Apple. Mine has been out of date since probably Mojave or my be the one before that…I’ve considered popping the original back in but as it hasn’t caused any issue for me it never got very high on the priority list.
I’ve talked to OWC support several times and always get the same answer…but no answer as to where the root cause of the failure lies…my guess is something on Apple’s side as OWC acknowledges the issue and if they could solve it via a firmware update on the Aura Pro I would think they would have done so.