Updating the AVR Programming Environment for Mac Catalina

When I first started programming AVR microcontrollers, Elliot Williams' Make: AVR Programming was my main reference (and still is for a lot of things). It was from this book that I got my programming environment setup through AVR CrossPack (which I believe included avrdude). Of course, I went this route because I was using a Mac. This worked great for the past 5 years but when I updated the OS, I ran into problems, two of which got me:

avrdude didn't recognize the mcu,
avr-gcc wasn't recognized (bad CPU error).

Now over the past 5 years since downloading AVR CrossPack I had become familiar with macports. So when I ran into the problems, I used macports to try and fix my problem. The first two things I tried were obvious; I used macports to re-install avrdude and avr-gcc (I uninsatlled AVR CrossPack by running a script they provided with the install):

port install avr-gcc
port install avrdude

I then tried to build my code and got some mysterious errors about avr/io.h not being found. This made sense. Either uninstalling AVR CrossPack uninstalled the libraries or I was linked to the correct location. I couldn't find where the library was so I figured it got removed. Searching avr on macports I realized that their is an avr-libc port which has the libraries I was looking for. After installing that I updated the paths to the includes and libraries (which for me are installed in /opt/local/ and can be found by using the contents command with macports: port contents avr-libc) and was good to go. I hope this helps anyone who was updating their Mac OS!