13B uses about 9GB on my MacBook Air. If you have another machine (x86) with enough RAM to convert the original LLaMA representation to GGML, you can give it a try. But quantization step must be done on MacBook.

Maybe it is more feasible for you to use 7B with larger context. For some "autocompletion" experiments with Python code I had to extend context to 2048 tokens (+1-1.5GB).