Can I run gemma-4-12b-it-GGUF on a Mac with 32 GB?

Yes

Its UD-Q8_K_XL file (13.6 GB) fits in the 21.3 GB a Mac with 32 GB can use, with room for ≈ 52K tokens of context.

ollama run hf.co/unsloth/gemma-4-12b-it-GGUF:UD-Q8_K_XL

Files and context on Mac with 32 GB

Each file of gemma-4-12b-it-GGUF (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.

gemma-4-12b-it-GGUF on other hardware

Popular models that run on Mac with 32 GB

Assumes 67% 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.