Can I run humanizer on a Mac with 64 GB?

Yes

Its published weights (23.9 GB) fit in the 48.0 GB a Mac with 64 GB can use, with room for ≈ 256K tokens of context.

Full analysis of humanizer Everything that runs on Mac with 64 GB Get the weights on Hugging Face

hf download jialinyyzz/humanizer

Files and context on Mac with 64 GB

Each file of humanizer (and of GGUF versions the site has analyzed), and how much context fits next to it, with the context cache in 16-bit or 8-bit.

File	Size	On Mac with 64 GB	Context (16-bit)	Context (8-bit)
As published	23.9 GB	Fits	256K	256K
BF16jialinyyzz/humanizer-GGUF	23.8 GB	Fits	175K	256K
Q8_0jialinyyzz/humanizer-GGUF	12.7 GB	Fits	256K	256K
Q6_Kjialinyyzz/humanizer-GGUF	10.0 GB	Fits	256K	256K
Q4_K_Mjialinyyzz/humanizer-GGUF	7.63 GB	Fits	256K	256K
IQ3_XXSjialinyyzz/humanizer-GGUF	5.59 GB	Fits	256K	256K
IQ2_XSjialinyyzz/humanizer-GGUF	3.89 GB	Fits	256K	256K

humanizer on other hardware

Popular models that run on Mac with 64 GB

Assumes 75% of the Mac's memory is usable (macOS's default limit for the GPU; it can be raised) and at least 4K tokens of context for one conversation, with the context cache in 16-bit unless noted. Fits leaves at least 20% of that memory for context; Tight leaves less.