Why is my new SSD disk not bootable
I downloaded and installed High Sierra on a USB. Replaced my internal disk with the SSD. Booted from USB, formatted the internal disk and installed High Sierra on the disk. When restarting I only get a question mark from my MAC. Open Disk Utility, looked at info on the disk and it says "Bootable = No". Any idea how I can solve this?
Disk: Samsung SSD 750 EVO - 500GB
File system: Mac OS Extended (Journaled) (tried with APSF, this didn't work either)
Scheme: GUID Partition Map
First Aid on the disk did not do any thing.