no hard drive boot option

Hi guys, I have a Z370 HD3 Gigabyte mb and a coffee lake i3. I installed High Sierra on my internal Samsung 970 Evo NVME M.2 & it won't show up now when the usb boot drive is now out of the desktop. With the usb stick with Unibeast and multibeast it installed fine and I used multibeast then...

Hello all! I am having a huge problem, and cannot find an answer anywhere. I have installed OS X Mavericks using the exact instructions here. It installs fine, no issues at all. Get to the point it reboots post install, and BAM. Problem. The only bootable option showing is the USB. The drive...