Sorry to bump an old thread, but hoping there has been a solution discovered... :-) This crash with the 3rd monitor is still happening for me even after a couple of OS upgrades, including a clean Sonoma 14.1.2 re-install It seems ok if the displays are mirroring, but its when they are independent that the issue occurs. This happens most days as the monitors come out of hibernation but have also tried unplugging before waking up / booting the mac. It seems twitchier about the LGTV,. Though if it survives the display dance, it can then be pretty stable unless one of the monitors goes in to power saving... (and have tried to disable this as much as possible in the respective devices). MacOS Sonoma 14.1.2 Intel MacBook Pro 16Gb / I7 Dell 4k 27" 2721Q (via USBC-> HDMI JSAux cable) LG TV 4K (via USBC-> HDMI JSAux cable) UN81006LB (v4.50.52) - p.s. , and the underscan option doesn't seem to work here :-( so I have to guess what the menus are ;-) but 50" is nice ;-) though it does on a mac air running Ventura 13.6.1 - go figure... Tried resetting the pram multiple times too... as advised elsewhere... Anyone found a solution, or got a way to fix the displays rather than letting it do the autodiscovery dance which is when it seems to crash? If this was Linux I would be setting up an xrandr config? Have shared many crash reports with Apple, and to have this persist across multiple OS updates isn't what I would expect from Apple, as from the discussion above it sounds like it is a pretty common problem with a three display setup. Alternatively does anyone know what I could capture that would help understand what is going on? i.e. debug logs from the display manager or config when it either crashes or when it works?