text model · Qwen3 · macOS
Can I run Qwen3 8B on Apple M3 Pro (18GB)?
Yes. Qwen3 8B runs on Apple M3 Pro (18GB) at Q4_K_M (~6.5 GB of ~12 GB usable).
Runs at Q4_K_M using ~6.5 GB of ~12 GB usable. You have room for Q8_0 for higher quality.
- Q4_K_M needed
- ~6.5 GB
- Usable on device
- ~12 GB
- Device memory
- 18 GB
- Best quant
- Q4_K_M
Run it
Pick your tool. All three load the same Q4_K_M weights.
ollama run qwen3:8b llama-cli -hf Qwen/Qwen3-8B-GGUF:Q4_K_M lms get Qwen/Qwen3-8B-GGUF vLLM is NOT a Mac tool, it is a CUDA/Linux serving engine. Unified memory is not a fixed VRAM slice; ~70% is usable for weights.
- Parameters
- 8B
- Q4_K_M size
- 5.03 GB
- Q8_0 size
- 8.71 GB
- Context
- 32k
- Ollama tag
- qwen3:8b
- Memory
- 18 GB unified
- Usable for weights
- ~12 GB
- Best runtime
- Ollama (llama.cpp Metal backend) / MLX
You could also run
Run Qwen3 8B on other hardware
FAQ
Can Apple M3 Pro (18GB) run Qwen3 8B?
Yes. Qwen3 8B runs on Apple M3 Pro (18GB) at Q4_K_M (~6.5 GB of ~12 GB usable).
How much memory does Qwen3 8B need?
Apple M3 Pro (18GB) has room to spare. At Q4_K_M the weights are ~5.03 GB; with KV cache and runtime overhead, budget ~6.5 GB at a 4k context.
What is the best tool to run Qwen3 8B on macOS?
LM Studio for a simple setup; mlx-lm for the most speed. vLLM is NOT a Mac tool, it is a CUDA/Linux serving engine. Unified memory is not a fixed VRAM slice; ~70% is usable for weights.
Sources
Memory figures are estimates. See methodology.