Everything works until The Post Installation with Multi beast - I get to the Clover boot screen but my only option is the USB, the HD El Capitan is not there so I can't get any further
It's driving me mad - any suggestions please!!
Have you verified that you have all the proper settings in the BIOS? Disabled SERIAL PORTS, Disabled VT-d and Secure Boot? Are you using UEFI or Legacy settings?
I found that also making sure that you plug the UBS Flash drive into the system board mounted USB (on the i/o header panel and not the ones on the front) helped with mine. The initial install take a while.
Also make sure that you ALWAYS (until you get fully installed and Chameleon installed to the HDD) that you use the -v (verbose boot option)