I followed this guide a while back to get Catalina installed and it's been great ever since! That is, up until today.... For some reason, I lost iMessages and AirPlay. I followed the Continuity guide again but no luck, so I figured I'd try the repair guide, maybe something got jacked up with my kexts somehow?? I haven't done anything but, who knows..... On reboot, I got the apple logo and the status bar went about 50-60%, and the screen blanked. I gave it a minute or so, activity light was flashing and caps lock light on/off, tapped a couple keys and got some sound from the internal speakers on my monitor so I'm thinking the display is just not showing up for some reason... Luckily I've messed this up a few thousand times so I had a backup of my working EFI and a working Mojave drive. I'm back on Catalina, but no iMessages or AirPlay. Any suggestions to get those working?