Touch bar will not light up.

richozz Said:

"Touch bar will not light up.: I am unable to enable the touch bar to light up."

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Troubleshooting Touch Bar:

A. Go Here: If Touch ID isn't Working on your Mac - Apple Support

B. Reset the SMC and your NVRAM:

(Applies to Intel-Based Macs Only): Sometimes when changes are made to the system(i.e. Updates), system configurations (i.e. for Power) become manipulated, technically. So, reset the SMC and NVRAM. Try performing each thrice. It may take sometime, being certain you have the time to perform these resets.

See if the following article can help:

• MacBook Touch Bar Not Working? 7 Fixes to Try - Switching2Mac