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fritzzzzzz

macrumors member
Original poster
what is the version of t2 in 10.15.7? mine is 18P50347c. I am wondering why the firmware is different. It should start with 17PXXXXXX
 
So now I can wait until big sur GM release ? T2 firmware cannot load back the old ones ?
You can revert, if you have another USB-C Mac and install Apple Configurator. The process will delete all the data on your internal storage.
It would be easier to update to a newer Big Sur beta to at least get the beta firmware to a newer version.
 
FWIW - MBP16,1 with 10.15.7 (19H2) same firmware:

Controller Information:
Model Name: Apple T2 Security Chip
Firmware Version: 17P6610
 
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