Can I Run Qwen3.8 on Apple M4 Pro?
Written by Jakub Rusinowski · Last updated September 11, 2026
No — Qwen3.8 27B at Q4_K_M needs 18.3 GB at 8K context (16.8 GB weights + 1.5 GB KV cache/overhead), and the Apple M4 Pro's 18 GB usable memory leaves it ~0.3 GB short. The cheapest card that runs it is the Intel Arc Pro B70 (32 GB).
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Apple M4 Pro Specs
| VRAM | 24 GB unified memory |
| Memory Bandwidth | 273 GB/s |
Qwen3.8 27B on the Apple M4 Pro: VRAM by quantization
| Quant | VRAM needed | Fits 24 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 57.1 GB | ✗ No | — | — |
| Q8_0 | 31 GB | ✗ No | — | Build for this |
| Q6_K | 24.3 GB | ✗ No | — | — |
| Q5_K_M | 21.2 GB | ✗ No | — | Build for this |
| Q4_K_M | 18.3 GB | ✗ No | — | Build for this |
| Q3_K_M | 13.3 GB | ✓ Yes | 64K | — |
| Q2_K | 10.6 GB | ✓ Yes | 64K | — |
Assumes an 8K-token context with an f16 KV cache. A longer window needs more; a quantized KV cache needs less. “Max context” is the largest window that still fits in 24 GB of unified memory. Figures are estimates from parameter count, quantization and memory bandwidth — the analyzer lets you tune KV-cache quant and context.
Context costs VRAM too. At Q4_K_M on the Apple M4 Pro: 8K 18.3 GB ✗ · 32K 19.9 GB ✗ · 128K 26.3 GB ✗. Past 8K it no longer fits 24 GB — a q8_0 KV cache buys roughly half of that back, which the calculator will price for you.
No compatible GPU? Qwen3.8 27B on 16 GB of system RAM, CPU only: runs.
Why It Does Not Fit
Every Qwen3.8 variant requires more VRAM than the Apple M4 Pro provides (24 GB).
Nearest GPU That Fits
Intel Arc Pro B70 (32 GB VRAM).
Qwen3.8 needs ~18 GB but this GPU has 24 GB. Rent a RTX 4090 (24 GB)-class GPU by the hour instead of buying one:
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FAQ
Qwen3.8 on the Apple M4 Pro — does it fit?
No — Qwen3.8 27B at Q4_K_M needs 18.3 GB at 8K context (16.8 GB weights + 1.5 GB KV cache/overhead), and the Apple M4 Pro's 18 GB usable memory leaves it ~0.3 GB short. The cheapest card that runs it is the Intel Arc Pro B70 (32 GB).
What GPU should I get instead to run Qwen3.8?
The Intel Arc Pro B70 (32 GB VRAM) is the cheapest upgrade that fits it.
Every Qwen3.8 size on the Apple M4 Pro
| Size | VRAM at 8K | Verdict | Speed |
|---|---|---|---|
| Qwen3.8-Max | 1457.5 GB | Does not fit | — |
| Qwen3.8-Flash-Next | 109.7 GB | Does not fit | — |
| Qwen3.8 27B | 18.3 GB | Runs at Q3_K_M | — |
Qwen3.8 on Other GPUs
- Qwen3.8 on NVIDIA GeForce RTX 4090
- Qwen3.8 on NVIDIA GeForce RTX 3090
- Qwen3.8 on AMD Radeon RX 7900 XTX
- Qwen3.8 on Apple M3
- Qwen3.8 on Apple M2
VRAM Tier
Troubleshooting
- Ollama: "model requires more system memory than is available"
- Which GGUF quant should I download? (Q4 vs Q5 vs Q8)
Buying Guide
← Can I Run It? | Qwen3.8 Model Page | Apple M4 Pro GPU Page | VRAM calculator | Check Your Hardware