I have followed the Diskmaker X process to create a bootable USB Drive for EL Capitan using DX version 5.0.1; all seems well and the drive is created and shows up in the finder. My problem is that it does not show up a "Start Up Disk" nor it does come up when I reboot and hold down the option key. I have tried several other USB drives and get the same problem.
Any help much appreciated,
Any help much appreciated,