Written by Jakub Rusinowski · Last updated March 12, 2025
Yes, but it is tight
Yes, but it is tight — Gemma 3 12B Instruct at Q4_K_M needs about 11.1 GB of the 12 GB usable on MacBook Air (M4, 16 GB), leaving only ~0.9 GB before the runtime starts swapping. Expect ~7.3 tok/s (estimated), with room for about 8,192 tokens of context.
Confidence: medium · Recommended quantization: Q4_K_M · Estimated speed: ~7.3 tok/s
| Usable memory for models | 12 GB |
| Memory bandwidth | 120 GB/s |
| Form factor | Laptop |
| Operating system | macOS |
| Memory upgradeable | No — soldered |
| Quant | Memory needed | Fits 12 GB? | Max context | Est. speed | Download |
|---|---|---|---|---|---|
| F16 | 27.9 GB | ✗ No | — | — | 24 GB |
| Q8_0 | 16.6 GB | ✗ No | — | — | 12.8 GB |
| Q6_K | 13.7 GB | ✗ No | — | — | 9.8 GB |
| Q5_K_M | 12.4 GB | ✗ No | — | — | 8.5 GB |
| Q4_K_M | 11.1 GB | ✓ Yes | 8K | ~7.3 tok/s | 7.2 GB |
| Q3_K_M | 9 GB | ✓ Yes | 8K | ~9.6 tok/s | 5.1 GB |
| Q2_K | 7.8 GB | ✓ Yes | 16K | ~11.6 tok/s | 3.9 GB |
| Variant | Needs at Q4_K_M | Fits? | Est. speed |
|---|---|---|---|
| Gemma 3 27B Instruct | 25.4 GB | ✗ Too large | — |
| Gemma 3 12B Instruct | 11.1 GB | ✓ Fits | ~7.3 tok/s |
| Gemma 3 4B Instruct | 4.4 GB | ✓ Fits | ~20.7 tok/s |
| Gemma 3 1B Instruct | 2 GB | ✓ Fits | ~59.6 tok/s |
Ollama or LM Studio (Metal) — MLX for the fastest Apple-native throughput
Yes, but it is tight — Gemma 3 12B Instruct at Q4_K_M needs about 11.1 GB of the 12 GB usable on MacBook Air (M4, 16 GB), leaving only ~0.9 GB before the runtime starts swapping. Expect ~7.3 tok/s (estimated), with room for about 8,192 tokens of context.
Q4_K_M — it needs about 11.1 GB of the 12 GB available, downloads as roughly 7.2 GB, and runs at an estimated 7.3 tokens/sec with up to 8K of context.
Nothing binding — the model fits with headroom and generates at a usable speed on this hardware.
Ollama or LM Studio (Metal) — MLX for the fastest Apple-native throughput