Local policy error when disabling SIP on Big Sur/M1 I'm trying to disable System Integrity Protection on an M1 Mac.
csrutil disable as well as csrutil authenticated-root disable fail with an error:

csrutil: Failed to update security configuration for &quot;Macintosh HD&quot;: Failed to create local policy

How can I avoid this failure? What is causing it?

This a brand-new Big Sur 11.0 (20A2411) on M1 MBP. FileVault is off. I'm booting into the new &quot;Options&quot; mode, and launching Terminal from there. Authentication is certainly OK, as I get a different error if I enter a wrong password. The user partition is accessible in this mode, I can write to /Volumes/Macintosh HD/Users/me/ for example.
-bash-3.2# csrutil disable
Turning off System Integrity Protection requires modifying system security.
Allow booting unsigned operating systems and any kernel extensions for OS &quot;Macintosh HD&quot;? [y/n]: y

Enter password for user admin: 
Mounted /dev/disk3s3 at &lt;private&gt;
Unmounted /dev/disk3s3 ( &lt;private&gt; )
csrutil: Failed to update security configuration for &quot;Macintosh HD&quot;: Failed to create local policy
I had the same problem. This worked for me.

csrutil clear
Restart and return to the recovery terminal
csrutil disable