Single User Mode Mounting Issues

[Obverser]

Hello!

Recently, I have been trying to use Single User Mode and have ran into a problem. When I try to mount / as read/write, I get ”operation not permitted,” “mount failed : error 77” (Errors are not verbatim, more so from memory) I have used the command said in booting process, “To Mount the root filesystem as read/write, do /sbin/mount -X /“ but that has not worked either. Why might this be?

Thanks in advance!

 

[IowaLynn]

The Read-only System volume
Perhaps the single, largest change in macOS Catalina is the manner in which the System volume is mounted on startup – it's read-only. By mounting the volume read-only, it becomes impossible for attackers to make changes to the content of the macOS System volume. That doesn't mean that your Mac is 100% free from all possible attack vectors, rather it's just another line of defense against them.

Working with APFS Volume Groups | Bombich Software

bombich.com

 

[Obverser]

Thanks for the quick reply! So the root filesystem is completely blocked. Why would they present the prompt to write on it in single user mode?

 

[LuisN]

sudo mount -ux /