Wildly Flashing Touch Bar at start up

thethirdoracle wrote:

I just purchased a refurbished MacBook Pro, I5, 2020. When I boot it up the Touch Bar flashes wildly on and off. Once I've entered my PW and it's booted up fully, the flashing Touch Bar stops. This seems abnormal behavior and I want to know what can cause it. Any ideas? Thanks!

On In Intel Machine you can try both

—resetting the System Management Controller Reset the SMC of your Mac - Apple Support

—resetting NVRAM/PRAM

Reset NVRAM on your Mac - Apple Support

"Wildly Flashing Touch Bar at start up: I just purchased a refurbished MacBook Pro, I5, 2020. When I boot it up the Touch Bar flashes wildly on and off. Once I've entered my PW and it's booted up fully, the flashing Touch Bar stops. This seems abnormal behavior and I want to know what can cause it. Any ideas? Thanks!"

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Start with leroydouglas' reply. If no success, try the following...

Troubleshooting Flashing Touch Bar:

A. Create a New Administrator User:

For Troubleshooting purposes, create a Time Machine Backup of your Mac (for restoration purposes), and then create a new Administrator user and see what happens. If it does not occur, then it is something configured in your current user. If it does occur, then it is a hardware issue, or an issue with the macOS. Once done using with it, log back in to this user, and then trash the one you've just created.

1. Go to: Apple menu 
2. Go to: System Settings
3. Click: Users & Groups 
4. Click: Add User or Add Group (in the sidebar)
5. Create: the Administrator User
6. Restart: the Mac
7. Login: as this new

B. Boot into Safe Mode:

Try logging in using Safe Mode (Hold down shift key upon boot). See if you can log in. Items only load as they do by default, while you are booted into Safe Mode. All caches are set aside.  Go Here: Use safe mode to isolate issues with your Mac - Apple Support

The above post about the Touch Bar Wildly Flashing is mine. I should add, it's updated to latest Tahoma OS. Is there an actual working fix in the last 4 years? This is 11/01/26. I see mixed replies mostly stating the code & updating something (can't recall name) hasn't worked for them. Has Apple piped in with a response/fix? HELP!