Can I Run Qwen3.8 on MacBook Pro 14" (M4 Pro, 24 GB)?

Written by Jakub Rusinowski · Last updated September 11, 2026

Yes — comfortably

Yes, comfortably — Qwen3.8 27B at Q3_K_M needs about 13.3 GB of the 18 GB usable on MacBook Pro 14" (M4 Pro, 24 GB), leaving ~4.7 GB spare and running at ~11.8 tok/s (estimated), with room for about 65,536 tokens of context.

Confidence: high · Recommended quantization: Q3_K_M · Estimated speed: ~11.8 tok/s

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MacBook Pro 14" (M4 Pro, 24 GB) — what it gives a model

Usable memory for models	18 GB
Memory bandwidth	273 GB/s
Form factor	Laptop
Operating system	macOS
Memory upgradeable	No — soldered
Price	$1,999 (lib/data/laptops.ts (street price), checked 2026-07-06)

Qwen3.8 on MacBook Pro 14" (M4 Pro, 24 GB): memory by quantization

Quant	Memory needed	Fits 18 GB?	Max context	Est. speed	Download
F16	57.1 GB	✗ No	—	—	55.6 GB
Q8_0	31 GB	✗ No	—	—	29.5 GB
Q6_K	24.3 GB	✗ No	—	—	22.8 GB
Q5_K_M	21.2 GB	✗ No	—	—	19.7 GB
Q4_K_M	18.3 GB	✗ No	—	—	16.8 GB
Q3_K_M	13.3 GB	✓ Yes	64K	~11.8 tok/s	11.8 GB
Q2_K	10.6 GB	✓ Yes	64K	~15 tok/s	9.1 GB

Which Qwen3.8 sizes fit

Variant	Needs at Q4_K_M	Fits?	Est. speed
Qwen3.8-Max	1457.5 GB	✗ Too large	—
Qwen3.8-Flash-Next	109.7 GB	✗ Too large	—
Qwen3.8 27B	18.3 GB	✗ Too large	—

What to watch out for

Q3_K_M is the only quantization that fits, and it is a heavily degraded one — expect noticeably worse output than the same model at Q4_K_M. A smaller model at Q4 is usually the better trade.
3 larger variants of Qwen3.8 do not fit and would need CPU offload or different hardware.
Memory on this machine is not upgradeable, so the configuration you buy is the ceiling for every model you will ever run on it.

MacBook Pro M4 Pro 24 GB limitations

Unified memory is soldered and cannot be upgraded after purchase.
24 GB is the practical ceiling for a single mid-size model plus a long context.

Recommended setup

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

How these numbers are calculated

Memory need = quantized weights + KV cache at 8,192 tokens (f16) + 0.8 GB runtime overhead.
24 GB unified memory at 273 GB/s, shared between CPU and GPU.
macOS reserves a share of unified memory for the system, so not all of it is available to a model.
Throughput is a memory-bandwidth roofline estimate, not a measurement. It is labelled "estimated" everywhere it appears.
KV cache is computed from this model's published attention configuration.

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