Using SAM3 on macOS

[bradleyandrew]

Hello,

I'm trying to run SAM 3 via ComfyUI using ComfyUI-RMBG. When ComfyUI is booting, only 32/33 Nodes are loaded from ComfyUI-RMBG. The SAM3 Node is not available.

In the logs I see this error message:

Error loading AILab_SAM3Segment.py: No module named 'triton'
[ComfyUI-RMBG] v2.9.4 | 32 nodes Loaded

My understanding is that Triton is Linux only and when I run 'pip install triton' it fails. I'm also unsure if the reason the Node isn't showing is because I don't have 'decord' installed. I have also tried 'pip install decord' which fails:

  x No solution found when resolving dependencies:
  `-> Because only the following versions of decord are available:
          decord==0.0.1
          decord==0.2.0
          decord==0.3.0
          decord==0.3.1
          decord==0.3.2
          decord==0.3.3
          decord==0.3.4
          decord==0.3.5
          decord==0.3.6
          decord==0.3.7
          decord==0.3.8
          decord==0.3.9
          decord==0.4.0
          decord==0.4.1
          decord==0.4.2
          decord==0.5.0
          decord==0.5.1
          decord==0.5.2
          decord==0.6.0
      and decord<=0.2.0 has no wheels with a matching Python ABI tag (e.g., `cp312`), we can conclude that decord<=0.2.0 cannot be used.
      And because decord>=0.3.0 has no wheels with a matching platform tag (e.g., `macosx_26_0_arm64`) and you require decord, we can conclude that your requirements are unsatisfiable.

      hint: Pre-releases are available for `decord` in the requested range (e.g., 0.2.0b20190929), but pre-releases weren't enabled (try: `--prerelease=allow`)

      hint: You require CPython 3.12 (`cp312`), but we only found wheels for `decord` (v0.2.0) with the following Python ABI tags: `cp35m`, `cp36m`, `cp37m`

      hint: Wheels are available for `decord` (v0.6.0) on the following platforms: `manylinux2010_x86_64`, `win_amd64`

I saw that there is an alternate decord repo that is tailored for macOS:
https://github.com/georgia-tech-db/eva-decord

Though it is unclear if installing that manually will make the SAM3 Node available or if it simply is not possible to use SAM 3 on macOS as 'triton' is Linux only.

Any help, guidance or suggestions would be appreciated.

[1038lab]

Thanks for the detailed report!
To clarify the situation:

The SAM3 node in ComfyUI-RMBG does not use Triton directly.

But the upstream SAM3 Python package imports Triton internally, and Triton has no macOS support.

SAM3 also requires decord, and decord unfortunately has no macOS wheel for Python 3.12, so it cannot be installed on your system either.

Because of these two upstream dependencies (Triton + decord), SAM3 cannot be imported on macOS right now, which is why ComfyUI shows only 32/33 nodes and the SAM3 node is missing.

At the moment SAM3 works only on Linux/Windows (CUDA).
If the upstream SAM3 team releases a Triton-free build and macOS-compatible decord wheels in the future, we will update SAM3Segment to support macOS.

Thanks for your understanding!