[Webkit-unassigned] [Bug 278277] New: REGRESSION(281888 at main)[WebGL][macOS] WebGL on GitHub Action macOS-13 isn't working anymore

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=278277

            Bug ID: 278277
           Summary: REGRESSION(281888 at main)[WebGL][macOS] WebGL on GitHub
                    Action macOS-13 isn't working anymore
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebGL
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: max at schmitt.mx
                CC: djg at apple.com, kbr at google.com, kkinnunen at apple.com

After https://commits.webkit.org/281888@main WebGL isn't working anymore on GitHub Actions environments.

Builds for macOS-14 seem to be working fine while macOS-13 WebGL isn't working. gl.createShader returns undefined.

Debug output from the OS:

```
Run system_profiler SPDisplaysDataType
2024-08-17 17:12:05.828 system_profiler[6901:38703] Device PreExisted [00000001000002d7] Apple Paravirtual device
Graphics/Displays:

    Apple Paravirtualized Graphics Device:

      Chipset Model: Apple Paravirtualized Graphics Device
      Type: GPU
      VRAM (Total): 64 MB
      Vendor: Apple (0x106b)
      Device ID: 0xeeee
      Revision ID: 0x0000
      Metal Support: Metal 2
      Displays:
        Display:
          Resolution: 1920 x 1080 (1080p FHD - Full High Definition)
          UI Looks like: 1920 x 1080 @ 30.00Hz
          Framebuffer Depth: 24-Bit Color (ARGB8888)
          Main Display: Yes
          Mirror: Off
          Online: Yes
          Connection Type: Internal
```

If you need anything else from our side, please let us know. Thanks!

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