Can I Run Qwen 3 on Mac Studio (M3 Ultra, 256 GB)?

Written by Jakub Rusinowski · Last updated April 28, 2025

Yes

Yes — Qwen 3 235B-A22B (MoE) at Q5_K_M needs about 168.9 GB of the 192 GB usable on Mac Studio (M3 Ultra, 256 GB) (~23.1 GB spare), at ~25.3 tok/s (estimated), with room for about 65,536 tokens of context.

Confidence: high · Recommended quantization: Q5_K_M · Estimated speed: ~25.3 tok/s

Mac Studio (M3 Ultra, 256 GB) — what it gives a model

Usable memory for models192 GB
Memory bandwidth819 GB/s
Form factorDesktop
Operating systemmacOS
Memory upgradeableNo — soldered

Qwen 3 on Mac Studio (M3 Ultra, 256 GB): memory by quantization

QuantMemory neededFits 192 GB?Max contextEst. speedDownload
F16472.4 GB✗ No470 GB
Q8_0252.1 GB✗ No249.7 GB
Q6_K195.1 GB✗ No192.7 GB
Q5_K_M168.9 GB✓ Yes64K~25.3 tok/s166.6 GB
Q4_K_M144.3 GB✓ Yes64K~29.1 tok/s141.9 GB
Q3_K_M102.5 GB✓ Yes64K~39 tok/s100.2 GB
Q2_K79.6 GB✓ Yes64K~47.9 tok/s77.3 GB

Which Qwen 3 sizes fit

VariantNeeds at Q4_K_MFits?Est. speed
Qwen 3 235B-A22B (MoE)144.3 GB✓ Fits~29.1 tok/s
Qwen 3 32B22.8 GB✓ Fits~20.2 tok/s
Qwen 3 30B-A3B (MoE)20 GB✓ Fits~120 tok/s
Qwen 3 14B11.1 GB✓ Fits~41 tok/s
Qwen 3 8B7 GB✓ Fits~65 tok/s

What to watch out for

Mac Studio M3 Ultra 256 GB limitations

Recommended setup

Ollama or LM Studio (Metal) — MLX for the fastest Apple-native throughput

How these numbers are calculated

FAQ

Can I run Qwen 3 on Mac Studio (M3 Ultra, 256 GB)?

Yes — Qwen 3 235B-A22B (MoE) at Q5_K_M needs about 168.9 GB of the 192 GB usable on Mac Studio (M3 Ultra, 256 GB) (~23.1 GB spare), at ~25.3 tok/s (estimated), with room for about 65,536 tokens of context.

Which quantization of Qwen 3 should I use on Mac Studio (M3 Ultra, 256 GB)?

Q5_K_M — it needs about 168.9 GB of the 192 GB available, downloads as roughly 166.6 GB, and runs at an estimated 25.3 tokens/sec with up to 64K of context.

What limits Qwen 3 on Mac Studio (M3 Ultra, 256 GB)?

Nothing binding — the model fits with headroom and generates at a usable speed on this hardware.

Which runtime should I use?

Ollama or LM Studio (Metal) — MLX for the fastest Apple-native throughput

Other Computers

Other Models on Mac Studio (M3 Ultra, 256 GB)

Qwen 3 on GPUs

What This Model Is Good At

Model & Tools

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