zlacker

So, a dummy hdmi plug will do the job?

>>mmis10+(OP)
Dummy might not do it. You could need a full fake display adapter - cutting the end off an HDMI won't do the bidirectional stuff monitors do these days, I believe.

>>jagged+L4
A dummy plug isn't just the end cut off of an HDMI cable, it actually simulates a monitor with EDID.

>>mmis10+(OP)
No need for dummy monitors, to disable the forced automatic sleeping behaviour when closing the lid just run

    sudo pmset -a disablesleep 1

>>mmis10+(OP)
Amphetamine.

>>freeho+of
I remembered that you used to need a kernel extension for this because the behavior is hardcoded without an option. Glad that they added a proper option so you no longer need to do this.