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Can a Mac Studio M4 Max (40c GPU) 128GB run Bonsai 2 9B (ternary)?

Yes. Bonsai 2 9B (ternary) fits in fast memory on Mac Studio M4 Max (40c GPU) 128GB at Q2_0 (4.6 GB needed, 96.0 GB usable), about 137 tok/s (estimate).

Hardware: Mac Studio M4 Max (40c GPU) 128GB · Model: Bonsai 2 9B (ternary)

Mac Studio M4 Max (40c GPU) 128GB has 128 GB of unified memory and 546 GB/s of memory bandwidth. M4 Max (40c GPU) 128GB has the same memory and bandwidth, so the fit numbers match; this page is Mac Studio M4 Max (40c GPU) 128GB. The checker leaves macOS a share of unified memory, so Ollama can use 96.0 GB. Bonsai 2 9B (ternary) (9B, Prism ML) at Q2_0 is a 3.2 GB download and needs 4.6 GB with headroom for about 8k tokens.

Best quantQ2_0
Download size3.2 GB
Memory needed4.6 GB
Usable fast memory96.0 GB
Fitfits in fast memory
Estimated speed~137 tok/s (estimate)
Commandollama run bonsai-2:9b
Open Mac Studio M4 Max (40c GPU) 128GB in the checker

Estimates, not benchmarks. Model sizes are ollama.com download sizes; memory needed adds headroom for ~8k tokens of context; speeds are rough figures from memory bandwidth. Data updated 2026-10-23.

A project by OnDevice Labs · llms.txt