Dev Builds ComfyUI Frontend for Qwen-Image 2.1 on Mac, Documents MPS Fixes
Spiritual-Savings377 · reddit · 2026-09-30
A developer open-sourced Image Studio, an AGPL local web app running Qwen-Image 2.1 via ComfyUI headless on Apple Silicon, replacing manual graphs with a prompt box and a small canvas of four node types.
Useful MPS tuning details for Mac users:
- --gpu-only keeps text encoders on GPU, 35% faster edits
- --cpu-vae: VAE encode/decode on MPS corrupts images (mean error 54/255 vs 1.8 on CPU)
- Official int8 text encoders rely on aten::intmm, missing in MPS; a one-time bf16 conversion lifts the 9B prompt enhancer from 0.4 to 11 tokens/s
Requires 64GB memory and Docker; weights stay under the non-commercial Qwen Research License.
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