$sudo mc common.c unimplemented subshell type 1 read (subshell_pty...): No such file or directory (2)
It appears that mc requires to match precompiled shell version, e.g. /bin/bash to be the one.
In order to resolve this, its is required to change default root shell from sh to bash, and do it with following command:
sudo dscl . -change /Users/root UserShell /bin/sh /bin/bash
To revert back in case you have some problems, just reverse the parameters:
sudo dscl . -change /Users/root UserShell /bin/bash /bin/sh
Just in case above commands do not work, may be default shell was already changed. Check it with command:
dscl . -read /Users/root UserShell
Hope it will save tons of time for you.