Can I run Ornith-1.5-35B-A3B on a Mac with 128 GB?

Yes

Its published weights (71.9 GB) fit in the 96.0 GB a Mac with 128 GB can use, with room for ≈ 256K tokens of context.

Full analysis of Ornith-1.5-35B-A3B Everything that runs on Mac with 128 GB Get the weights on Hugging Face

hf download ornith-ai/Ornith-1.5-35B-A3B

Files and context on Mac with 128 GB

Each file of Ornith-1.5-35B-A3B (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 128 GB	Context (16-bit)	Context (8-bit)
As published	71.9 GB	Fits	256K	256K
BF16ornith-ai/Ornith-1.5-35B-A3B-GGUF	71.1 GB	Fits	256K	256K
Q8_0ornith-ai/Ornith-1.5-35B-A3B-GGUF	37.8 GB	Fits	256K	256K
Q6_Kornith-ai/Ornith-1.5-35B-A3B-GGUF	29.2 GB	Fits	256K	256K
Q5_K_Mornith-ai/Ornith-1.5-35B-A3B-GGUF	25.3 GB	Fits	256K	256K
Q4_K_Mornith-ai/Ornith-1.5-35B-A3B-GGUF	21.7 GB	Fits	256K	256K

Ornith-1.5-35B-A3B on other hardware

Popular models that run on Mac with 128 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.