Installation problem: Missing operating system.

[LeonardoRC]

Hello everyone, I've recently tried to install Mojave, I'm new to the Hackintosh world and I've never done any Hackintosh machine yet. I've followed every step in the installation guide, except for some BIOS/UEFI settings as I couldn't find them.
When I try to boot the USB, it says "Missing operating system". I don't really know what to do. If anyone could help I would appreciate.

Mobo: ASROCK H170PRO4
Gpu: GTX 960
Cpu: i5 6500

 

[joej]

Today, I pulled down Mojave + Unibeast for Mojave + Multibeast for High Sierra (no Mojave-specific version available)
Ran unibeast, it failed for some 'plist' problem.
Tried again, it worked.

Moved USB over to the to-be-hackintosh and the boot says "Missing operating system"

... time to WIPE the usb and try it again from the top. **EDIT** ... by redoing the Disk Utility erase; "show all devices"; select top level of the USB; then forcing GUID and erase

 

[joej]

update: ensuring GUID partition type, solves the problem

 

[squarecandy]

This solved it for me:
https://apple.stackexchange.com/a/304980
Older version of Disk Utility didn't hide the actual disk and only show the volumes be default, so I was confused on the first go.
Make sure to set View > Show All Devices in Disk Util

 

[cod22pro]

Sorry for bumping this thread, but this should be included in the Install guides.

EDIT: I didn't follow the install guide closely, my mistake.