$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.
Midnight Commander is still actively developed. But this default shell bug has been ongoing for years. Apple switched Catalina to use zsh but default /bin/sh is still there for backwards compatibility of bourne shell scripts. Other OSes are impacted by this shell issue. Some use the Dash shell to be /bin/sh, etc.
Newer console file managers such as lf, ranger, broot, vifm, nnn, fff, etc., etc., etc. are worth a look.