I am still using an old MacBook with OS X 10.10 (Yosemite). I can no longer install Maxima using MacPorts there. Luckily I stumbled upon a Maxima installation instruction at The MaximaList. It worked out nicely and I was able to install Maxima-5.43.0 on my old MacBook, so I can now use Maxima there again. It appears that I can only use the graphical interface wXMaxima, not the one that I can run in the command shell. I am not complaining though.
If you are using an old MacBook like me and want to use Maxima, go at it.
