The shell script you linked is indeed the raw weights, but if you have the storage space you can download them and use the llama-cpp repo posted here a few days ago (https://github.com/ggerganov/llama.cpp) to compress them, the 'Usage' section of the readme worked for me.
I'm using a not-that-new Macbook Pro (intel, 16GB memory) and was able to run the 7B and 13B models that way, tried 30B but it seemed to hang.