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Can a Mac Studio M5 Max (40c GPU) 64GB run Qwen 2.5 72B?

Yes, if the Mac GPU limit is raised. Qwen 2.5 72B on Mac Studio M5 Max (40c GPU) 64GB at Q4_K_M needs sudo sysctl iogpu.wired_limit_mb=54375 (51.1 GB needed, 48.0 GB usable), about 10 tok/s (estimate).

Hardware: Mac Studio M5 Max (40c GPU) 64GB · Model: Qwen 2.5 72B

Mac Studio M5 Max (40c GPU) 64GB has 64 GB of unified memory and 614 GB/s of memory bandwidth. The checker leaves macOS a share of unified memory, so Ollama can use 48.0 GB. Qwen 2.5 72B (72.7B, Alibaba) at Q4_K_M is a 47 GB download and needs 51.1 GB with headroom for about 8k tokens.

Best quantQ4_K_M
Download size47 GB
Memory needed51.1 GB
Usable fast memory48.0 GB
Fitfits if the Mac GPU limit is raised
Estimated speed~10 tok/s (estimate)
Mac GPU limitsudo sysctl iogpu.wired_limit_mb=54375
Commandollama run qwen2.5:72b
Open Mac Studio M5 Max (40c GPU) 64GB 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