There are many alternatives to muCommander for Mac if you are looking for a replacement. The best Mac alternative is Double Commander, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to muCommander and many of them are available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to muCommander are Midnight Commander (Free, Open Source), Thunar (Free, Open Source), Forklift (Paid) and fman (Freemium).
Thunar is a new modern file manager for the Xfce Desktop Environment. Thunar has been designed from the ground up to be fast and easy-to-use. Its user interface is clean and intuitive, and does not include any confusing or useless options.
ranger is a file manager with VI key bindings. It provides a minimalistic and nice curses interface with a view on the directory hierarchy. The secondary task of ranger is to psychically guess which program you want to use for opening particular files.
The Finder is the first thing that you see when your Mac finishes starting up. It opens automatically and stays open as you use other apps. It includes the Finder menu bar at the top of the screen and the desktop below that.