So I’ve noticed that if you have a program crash on you Mac while running it hard, a process called spindump is started that consumes 100% of your CPU. The man page of spindump says

“spindump is a tool used by various system components to create reports when an unresponsive application is force quit.”

While this is helpful for Apple developers to solve the problem that caused you app to crash in the first place, it can be quite annoying because every running program becomes unresponsive and you can’t even start the Activity Monitor to kill off the spindump process, which if you manage to do it will just spawn up again even if you restart the computer. So here is the solution I found after poking around in the system launch daemons

sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.spindump.plist