Touch Bar flashes after update macOS

mrokutwr wrote:

I updated a 13 inch MacBook Pro with an M1 processor to Mac OS 13.6.1. After this, the touch bar began to flicker. Restarting the Mac doesn't help. The touch bar itself works, but it flickers annoyingly, it has become impossible to work

https://discussions.apple.com/content/attachment/558a52bf-247a-407b-8e7b-42bfdc47cf0f

You can try revive or restore and see if it comes back to life.

Revive or restore a Mac with Apple silicon using Apple Configurator - Apple Support

Call Customer Support (800) MY–APPLE (800–692–7753)

or on line https://getsupport.apple.com/

or call AppleCare Support at 1-800-APLCARE (800-275-2273)

Outside the USA—Contact Apple for support and service by phone

See a list of Apple phone numbers around the world.

Contact Apple for support and service - Apple Support

if it is an issue with the update:

submit your Apple Feedback here: Product Feedback - Apple

worse case scenerio is a hardware issue. You can put black electrician tape to cover the touchbar if it is impossible to work.

Get your Mac ready for service - Apple Support Get your Mac ready for service - Apple Support