Can I Run Llama 4.5 on Apple M3 Pro?
Written by Jakub Rusinowski · Last updated September 29, 2026
No — Llama 4.5 Scout at Q4_K_M needs 69.4 GB at 8K context (65.8 GB weights + 3.6 GB KV cache/overhead), and the Apple M3 Pro's 27 GB usable memory leaves it ~42.4 GB short. The cheapest card that runs it is the NVIDIA RTX PRO 5000 Blackwell (72 GB) (72 GB).
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Apple M3 Pro Specs
| VRAM | 36 GB unified memory |
| Memory Bandwidth | 153 GB/s |
Llama 4.5 Scout on the Apple M3 Pro: VRAM by quantization
| Quant | VRAM needed | Fits 36 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 221.6 GB | ✗ No | — | — |
| Q8_0 | 119.4 GB | ✗ No | — | — |
| Q6_K | 92.9 GB | ✗ No | — | — |
| Q5_K_M | 80.8 GB | ✗ No | — | — |
| Q4_K_M | 69.4 GB | ✗ No | — | — |
| Q3_K_M | 50 GB | ✗ No | — | — |
| Q2_K | 39.4 GB | ✗ No | — | — |
Assumes an 8K-token context with an f16 KV cache, on an estimated architecture — this model publishes no config we can read. A longer window needs more; a quantized KV cache needs less. “Max context” is the largest window that still fits in 36 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 M3 Pro: 8K 69.4 GB ✗ · 32K 77.6 GB ✗ · 128K 110.6 GB ✗. Past 8K it no longer fits 36 GB — a q8_0 KV cache buys roughly half of that back, which the calculator will price for you.
No compatible GPU? Llama 4.5 Scout on 64 GB of system RAM, CPU only: runs, but it is tight.
Why It Does Not Fit
Every Llama 4.5 variant requires more VRAM than the Apple M3 Pro provides (36 GB).
Nearest GPU That Fits
NVIDIA RTX PRO 5000 Blackwell (72 GB) (72 GB VRAM).
Llama 4.5 needs ~69 GB but this GPU has 36 GB. Rent a A100 (80 GB)-class GPU by the hour instead of buying one:
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FAQ
Will Llama 4.5 run on the Apple M3 Pro?
No — Llama 4.5 Scout at Q4_K_M needs 69.4 GB at 8K context (65.8 GB weights + 3.6 GB KV cache/overhead), and the Apple M3 Pro's 27 GB usable memory leaves it ~42.4 GB short. The cheapest card that runs it is the NVIDIA RTX PRO 5000 Blackwell (72 GB) (72 GB).
What GPU should I get instead to run Llama 4.5?
The NVIDIA RTX PRO 5000 Blackwell (72 GB) (72 GB VRAM) is the cheapest upgrade that fits it.
Llama 4.5 on Other GPUs
- Llama 4.5 on NVIDIA GeForce RTX 5090
- Llama 4.5 on Apple M4
- Llama 4.5 on Apple M2 Pro
- Llama 4.5 on Apple M1 Pro
- Llama 4.5 on Apple M5
Popular Models on the Apple M3 Pro
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? | Llama 4.5 Model Page | Apple M3 Pro GPU Page | VRAM calculator | Check Your Hardware