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Pin the MPS test leg to macos-15: torch 2.14's attention kernel cannot compile on the macos-latest virtual GPU #1241

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Merged
alanprior merged 7 commits into from
Sep 5, 2026
Merged

Pin the MPS test leg to macos-15: torch 2.14's attention kernel cannot compile on the macos-latest virtual GPU #1241

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0b30fd3
Verify CI against torch 2.14.0 with main's code unchanged
alanprior Sep 4, 2026
88cf244
Add a throwaway MPS probe workflow for the runner investigation
alanprior Sep 4, 2026
0b71da2
Quote the pip line in the probe workflow: YAML read ':all: torch' as …
alanprior Sep 4, 2026
0fff101
Probe the SDPA kernel TabPFN's MPS backend uses, across dtypes, head …
alanprior Sep 4, 2026
6442f4d
Run the MPS tests on macos-15 when the macos-latest virtual GPU canno…
alanprior Sep 4, 2026
ca17af2
Remove the throwaway MPS probe workflow
alanprior Sep 4, 2026
d76e085
Pin the MPS test leg to macos-15 instead of a runtime fallback
alanprior Sep 4, 2026
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5 changes: 4 additions & 1 deletion .github/workflows/ci.yml
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Expand Up @@ -50,7 +50,10 @@ jobs:
- os: windows-latest
python-version: "3.10"
dependency-set: lowest-direct
- os: macos-latest
# macos-latest (macOS 26) runs on a virtual GPU that cannot compile the
# fp16/bf16 attention kernel torch >= 2.14 uses there, so the MPS tests
# fail. Physical Macs are fine. TODO: retry macos-latest around 2026-11.
- os: macos-15
python-version: "3.14"
dependency-set: highest
- os: windows-latest
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