I actually copied the system I had previously installed on a USB SSD to the nvme disk and after modifying the initrd to include the nvme kernel module I have a system which boots and runs directly from the nvme disk.
Since I’m using disk encryption I had to remember to update /conf/conf.d/cryptroot inside of the initrd to use the correct partition and also run ‘grub-install /dev/nvme0n1’
It’ll be nice when the keyboard, trackpad and internal wireless network adaptor are supported.
Prior to installation, I ended up re-installing OS X in order to repartition the disk since OS X disk encryption seemed to be interfering with the process.
I’m running kernel: Linux crapple 4.4.0-rc4 #1 SMP Thu Dec 10 16:32:48 CST 2015 x86_64 GNU/Linux