NVMe Support for Apple machines - only drivers or EFI modules necessary?

I have been looking for a solution for Macbook NVME boot.
The Apple Bootrom doesn’t seem to recognize NVME disks, even after the update to HighSierra which changed the Bootrom to a newer version (no more beep noise on startup, and supposedly compatible with NVME).
I found an alternative solution which involves booting to a USB disk first: https://forums.macrumors.com/threads/boo…e-card.1967790/
But it would be really great to modify Apple Bootrom to make it able to see NVME disks like Kingston KC1000.
Anyone has any ideas on how?

Welcome to the Win-RAID Forum!
I am sorry, but I personally cannot help you, because I don’t have any own experience with Apple computers or Operating Systems.
Hopefully you will get support by anyone else.

Dieter (alias Fernando)

@pedrosimao :
What your trying to do is at the moment very difficult. I would go to Insanelymac.com and ask the Gurus over there what to do.

Problem #1 is that Apple hardware is proprietary. Problem #2 High Sierra is now using the AFPS file system.
But I think the Apple firmware may have a whitelist. Their drives also need to have certain sector size configurations as well.

Not sure if its doable.

EDIT by Fernando: Dispensable fully quoted post replaced by a personal addressing (to save space)

@pedrosimao :
@davidm71 :
Since your contributions have not much to do with the thread, where they were posted, I have moved them into a new thread and gave it a hopefully meanigful title.
Hoping, that you agree with my action

No problem, I have no reason to disagree. I just ask myself if people here will be interested about Apple systems.

@davidm71 thanks a lot, I know it is not easy. I will follow your suggestion and ask in Insanelymac.

Good luck. You would probably have to patch the kernel and it’s going to be a pain as after every osx update it would revert. I would repurpose that nvme drive for another system if I was you.

What MacBook model if I may ask? Fwiw I have a MacBook that despite what some people have said will not support nvme. Bet yours is the same type and you should have bought a standard ngff sata m.2 drive.

@davidm71 My model is a MacBook Pro 15" Retina (late 2013).
I have a Kingston KC1000 NVME 480Gb running on it with no problem. I just bought a M.2 converter on Amazon and it works just fine.
The only problem I face is bootrom not recognizing it. HighSierra have the drivers that make it possible to use NVME disks. Before High Sierra it was not possible.