I have been using colima to run x64_86 images on an M1 ARM mac. Occassionally it just hangs and it needs to be killed. The most efficient way I have found is to use htop brew install htop to find and kill the processes. The procedure goes like this:
htop -t - start the process in tree mode
/ colima - find the first process
c - mark this process and all children
Use the NEXT in the bottom right to find each of the trees and mark them
ESC - exit search
k - kill all the marked processes
Be sure not to select anything you don't mean to kill or you might be restarting your box to recover.
