Mac – search for applications compiled against X11/Xorg for MacPorts

Many ports have a +nox11 variant, which you can add as a default variant in the variants.conf file that's pointed to in your macports.conf file. However, in my experience, there are some X11-dependent ports that don't have the +nox11 variant. I believe I've also seen situations in which non-X11-dependet port A depends on port B, and port B is so deeply X11-dependent that it wouldn't even make sense for it to have a +nox11 variant. Overall, in my experience, it's practically impossible to keep Xorg from getting installed. :-(

No - as removing macports will remove the software it installs. Macports )and Fink) are designed so that they use directories that only they update and control so that they have full control of what happens).

In this case however you can get to this stage.

1. Remove Homwbrew or at least remove or rename /usr/local
2. Install macports and check that the /opt/local/bin is at the end of your path
3. Install firefox-xll
4. Reinstall Homebrew or restore /usr/local

As /usr/local/bin is before /opt/local/bin in your path then you will get the Homebrew program before the macports one.