Running MacOS Headless

I installed Catalina on an older optiplex mini box to use airmessage. It's working well so far, but I'd like to be able to boot it up without a monitor. Right now, if I don't have a monitor connected it won't boot, and plugging in a monitor after it's already started without one doesn't do anything. However it works perfectly fine if I boot with a monitor, then disconnect it after booting and just use vnc when I need to change something.

I know I could get a dongle to emulate a monitor, but before I spend money on one, is there a way to emulate a monitor with just opencore?

submitted by /u/silvertricl0ps
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