Same issue with MBP Early 2015.
@sf98723
Thanks a lot for your instruction.
I have tried your steps, but after the last step (csrutil enable) , I also had the restart loop problem as McQueen_69 and mergenc.
@mergenc
Thanks for your input, I tried to run 'csrutil disable' in rescue mode again, the restart loop problem fixed.
Seems MBP 2015 has a little different with MBP 2014 😂
daemon1978
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