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[GH-ISSUE #15477] Error: 500 Internal Server Error: mlx runner failed: Error: MLX not available #9893

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opened 2026-04-12 22:44:52 -05:00 by GiteaMirror · 2 comments
GiteaMirror commented 2026-04-12 22:44:52 -05:00
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Originally created by @miguelpark on GitHub (Apr 10, 2026).
Original GitHub issue: https://github.com/ollama/ollama/issues/15477

What is the issue?

can't load mxfp8 or nvfp4 any models run with mlx

~ % ollama run qwen3.5:9b-mxfp8
Error: 500 Internal Server Error: mlx runner failed: Error: MLX not available: failed to load MLX dynamic library (searched: [/opt/homebrew/Cellar/ollama/0.20.5/bin/lib/ollama /opt/homebrew/Cellar/ollama/0.20.5/bin /opt/homebrew/var/build/lib/ollama]) (exit: exit status 1)
~ % ollama run qwen3.5:9b-nvfp4
Error: 500 Internal Server Error: mlx runner failed: Error: MLX not available: failed to load MLX dynamic library (searched: [/opt/homebrew/Cellar/ollama/0.20.5/bin/lib/ollama /opt/homebrew/Cellar/ollama/0.20.5/bin /opt/homebrew/var/build/lib/ollama]) (exit: exit status 1)

Relevant log output

OS

macOS

GPU

Apple

CPU

Apple

Ollama version

0.20.5

Originally created by @miguelpark on GitHub (Apr 10, 2026). Original GitHub issue: https://github.com/ollama/ollama/issues/15477 ### What is the issue? can't load mxfp8 or nvfp4 any models run with mlx ~ % ollama run qwen3.5:9b-mxfp8 Error: 500 Internal Server Error: mlx runner failed: Error: MLX not available: failed to load MLX dynamic library (searched: [/opt/homebrew/Cellar/ollama/0.20.5/bin/lib/ollama /opt/homebrew/Cellar/ollama/0.20.5/bin /opt/homebrew/var/build/lib/ollama]) (exit: exit status 1) ~ % ollama run qwen3.5:9b-nvfp4 Error: 500 Internal Server Error: mlx runner failed: Error: MLX not available: failed to load MLX dynamic library (searched: [/opt/homebrew/Cellar/ollama/0.20.5/bin/lib/ollama /opt/homebrew/Cellar/ollama/0.20.5/bin /opt/homebrew/var/build/lib/ollama]) (exit: exit status 1) ### Relevant log output ```shell ``` ### OS macOS ### GPU Apple ### CPU Apple ### Ollama version 0.20.5
GiteaMirror added the bug label 2026-04-12 22:44:52 -05:00
GiteaMirror commented 2026-04-12 22:44:53 -05:00
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@wpostma commented on GitHub (Apr 11, 2026):

I think this has been logged several times, there was a comment in another issue with a probable workaround for it not finding some shared library, in another recent bug logged.

<!-- gh-comment-id:4229732208 --> @wpostma commented on GitHub (Apr 11, 2026): I think this has been logged several times, there was a comment in another issue with a probable workaround for it not finding some shared library, in another recent bug logged.
GiteaMirror commented 2026-04-12 22:44:53 -05:00
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@leftbankvines commented on GitHub (Apr 11, 2026):

I’m also seeing this on Homebrew 0.20.5 / Apple Silicon with MLX-backed models. I posted full reproduction details and failed workaround results on #15479 since that appears to match my setup more closely.

<!-- gh-comment-id:4230038706 --> @leftbankvines commented on GitHub (Apr 11, 2026): I’m also seeing this on Homebrew 0.20.5 / Apple Silicon with MLX-backed models. I posted full reproduction details and failed workaround results on #15479 since that appears to match my setup more closely.
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