MacBook Pro users experiencing Touch Bar issues after MacOS update, including Touch Bar not working or going black.
Troubleshooting steps include killing/relaunching TouchBarServer process, restarting Mac, booting into Safe Mode, and unusual sequence involving Recovery Mode shutdown and boot.
Some users find Touch Bar settings disappear, even with TouchBarServer running.
If Touch Bar remains dead, repair service may be needed, but cost can be high for out-of-warranty models, suggesting alternatives like new Mac or external keyboard.