Successfully installed Mojave on my HP ZBook 15 G1 (i7 4800MQ 2,7 GHz) (as well as High Sierra). Would like to use second display, but no avail. Learnt that Nvidia is supported no longer, so trying to make use of Intel HD 4600. Tried ig platform id 0x0a260006, IntelGFX=0 but no success. What...