# Can I run Stable Diffusion XL 1.0 on Apple M3 Ultra (256GB)?

Updated: 2026-06-15

**Yes, it runs.** Runs at fp16 using ~7.5 GB of ~192 GB usable.

- Model: 2.6B UNET image model, peak ~7.5 GB VRAM at fp16
- Device: 256 GB unified, ~192 GB usable
- All components resident (no offload): ~8.5 GB
- Offload floor (slow): ~4 GB
- Tools: ComfyUI, AUTOMATIC1111 / Forge, Draw Things, diffusers
- License: CreativeML OpenRAIL++-M (commercial use: yes)

Sources: https://huggingface.co/stabilityai/stable-diffusion-xl-base-1.0, https://stability.ai/news-updates/sdxl-09-stable-diffusion, https://github.com/Comfy-Org/ComfyUI/issues/2855, https://github.com/AUTOMATIC1111/stable-diffusion-webui/wiki/Optimum-SDXL-Usage.

More: https://localmodel.run/can-i-run/sdxl-1-0/apple-m3-ultra-256gb