MacOS unittest and binary jobs failing

[NicolasHug]

Both with a segfault in torchvision's setup.py:

• https://app.circleci.com/pipelines/github/pytorch/vision/17824/workflows/63ed118f-e479-47e5-91c1-2f0805ce2e5a/jobs/1443411

• https://app.circleci.com/pipelines/github/pytorch/vision/17824/workflows/97a4d0cf-ecd8-402f-bb8d-301cd68c2ea3/jobs/1443375

[pmeier]

Probably related to pytorch/pytorch#77662 (comment).

[pmeier]

It seems like binaries built on macOS 12 are not compatible with macOS 11. pytorch/pytorch#77662 switched the builders to macOS 12, but our complete infrastructure builds upon macOS 11 and lower:

• vision/.github/workflows/prototype-tests.yml

  Line 13 in 60ce5bf

  - macos-latest

  
  (macos-latest is equivalent to macOS 11.*)

• vision/.circleci/config.yml

  Lines 460 to 461 in 60ce5bf

  	macos:
  	xcode: "12.0"

  
  (xcode: "12.0" is equivalent to macOS 10.15.5)

This is why we see the outage across all macOS CI jobs.

[albanD]

This is not an expected change. We will revert this change in core.

[pmeier]

Was fixed in pytorch/pytorch#78136! Thanks @malfet

• https://github.com/pytorch/vision/runs/6572753695
• https://app.circleci.com/pipelines/github/pytorch/vision/17866/workflows/15a8ff89-782a-40a9-8f14-34cc9cb0072b/jobs/1446630
• https://app.circleci.com/pipelines/github/pytorch/vision/17866/workflows/49b2a6cf-c54e-4c21-8a0d-a477e70c884f/jobs/1446653