I have my audio recording setup on a different boot drive running Mavs. I've got some older software and plugins that I've got dialed in pretty well and don't want to upgrade and mess it up. I've learned the hard way with DAW's to just leave it alone if it's working. In the future I may try and get it up to El Cap, but I just wanted to know for now if I could get NVMe to work with Mavs.
Yeah, better not play around if it’s all going well. I’ll let you know if I find a way to get NVMe and Mavs to play together but not holding out on any hope for you.
im in the same boat due to still using legacy TC Electronics hardware which wouldnt run past Mavericks. i played around with it a lot but it just never worked. you could get it to at least see there's a device there, but it wasn't able to recognize it as a drive. there's just no kernel-level support for the NVMe protocol there which is whats needed.