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To be clear, The Touch Bar hardware works. The app controls appear and function normally. But the control strip that should appear on the right side doesn't.
Looking in /var/log/system.log, I see the com.apple.controlstrip service starts, immediately crashes with SIGILL, and restarts once every second:
MacBook Pro
If resetting the SMC https://support.apple.com/en-us/HT201295
fails to resolve your issue...
Try resetting NVRAM/PRAM http://support.apple.com/kb/ht1379
If nothing these two do not bring it back to life—you have a hardware issue.
In or out of warranty you can get a free over the counter 'Apple Service Diagnostics' test /assessment
Make an appointment for a "hardware issue"—
https://www.apple.com/retail/geniusbar/
Outside the USA
https://locate.apple.com/country
From iOS device using the app to make a online Genius Bar appointment is easy:
https://itunes.apple.com/us/app/apple-support/id1130498044?mt=8
(note: due to the temporary closure of Apple Stores and the staggered reopening there may be some delays.
ref: https://www.apple.com/shop/browse/store/temporary_closures )
“Mac notebook, contact us and we'll send you a box you can use to ship it to an Apple Repair Center. We'll return your repaired product to you as quickly as possible. Depending on where you get service, you might be able to check the status of your repair online.” Start a service request https://support.apple.com/mac/repair/service
Call Customer Support (800) MY–APPLE (800–692–7753)
or call AppleCare Support at 1-800-APLCARE (800-275-2273)
Get your Mac ready for service - Apple Support https://support.apple.com/en-us/HT209095
If resetting the SMC https://support.apple.com/en-us/HT201295
fails to resolve your issue...
Try resetting NVRAM/PRAM http://support.apple.com/kb/ht1379
If nothing these two do not bring it back to life—you have a hardware issue.
In or out of warranty you can get a free over the counter 'Apple Service Diagnostics' test /assessment
Make an appointment for a "hardware issue"—
https://www.apple.com/retail/geniusbar/
Outside the USA
https://locate.apple.com/country
From iOS device using the app to make a online Genius Bar appointment is easy:
https://itunes.apple.com/us/app/apple-support/id1130498044?mt=8
(note: due to the temporary closure of Apple Stores and the staggered reopening there may be some delays.
ref: https://www.apple.com/shop/browse/store/temporary_closures )
“Mac notebook, contact us and we'll send you a box you can use to ship it to an Apple Repair Center. We'll return your repaired product to you as quickly as possible. Depending on where you get service, you might be able to check the status of your repair online.” Start a service request https://support.apple.com/mac/repair/service
Call Customer Support (800) MY–APPLE (800–692–7753)
or call AppleCare Support at 1-800-APLCARE (800-275-2273)
Get your Mac ready for service - Apple Support https://support.apple.com/en-us/HT209095
I found the service in the launchd config and attempted to start it manually. This assertion failure is tripped:
2020-09-18 11:24:37.822 ControlStrip[7621:828492] *** Assertion failure in -[ControlStrip.ControlStripCollectionView setSubviews:], /AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/AppKit/AppKit-1894.60.100/AppKit.subproj/NSView.m:2556
zsh: illegal hardware instruction ./ControlStrip
2019 MBP Control Strip doesn't work - com.apple.controlstrip repeatedly crashes
