VGF tutorial on MacOs creates dir with bad arch

[reuvenperetz]

🐛 Describe the bug

Hello,

When running "Arm VGF Backend Tutorial" on Mac, i get the following error:
/executorch/backends/arm/scripts/vulkan_utils.sh: line 61: cd: vulkan_sdk/1.4.321.1/arm64/bin: No such file or directory

For some reason, when i run: "examples/arm/setup.sh --i-agree-to-the-contained-eula --disable-ethos-u-deps --enable-mlsdk-deps" it creates a directory in "examples/arm/ethos-u-scratch/vulkan_sdk/1.4.321.1/aarch64" even though "uname -a" returns "arm64"

Versions

Collecting environment information...
PyTorch version: 2.10.0.dev20251025
Is debug build: False
CUDA used to build PyTorch: None
ROCM used to build PyTorch: N/A

OS: macOS 15.5 (arm64)
GCC version: Could not collect
Clang version: 17.0.0 (clang-1700.0.13.5)
CMake version: version 3.31.10
Libc version: N/A

Python version: 3.12.10 (v3.12.10:0cc81280367, Apr 8 2025, 08:46:59) [Clang 13.0.0 (clang-1300.0.29.30)] (64-bit runtime)
Python platform: macOS-15.5-arm64-arm-64bit
Is CUDA available: False
CUDA runtime version: No CUDA
CUDA_MODULE_LOADING set to: N/A
GPU models and configuration: No CUDA
Nvidia driver version: No CUDA
cuDNN version: No CUDA
Is XPU available: False
HIP runtime version: N/A
MIOpen runtime version: N/A
Is XNNPACK available: True

CPU:
Apple M4 Max

Versions of relevant libraries:
[pip3] executorch==1.1.0a0+3f34709
[pip3] numpy==2.3.5
[pip3] pytorch_tokenizers==1.0.1
[pip3] torch==2.10.0.dev20251025
[pip3] torchao==0.14.0+git01849b2b1
[pip3] torchaudio==2.10.0.dev20251025
[pip3] torchdata==0.11.0
[pip3] torchsr==1.0.4
[pip3] torchtune==0.6.1
[pip3] torchvision==0.25.0.dev20251025
[conda] Could not collect

[SS-JIA]

cc: @robell

[reuvenperetz]

Closing the issue. The fix was to update vulkan_utils.sh to use the macOS-specific Vulkan SDK URL and to remove the architecture subfolder from the SDK path. On macOS the layout should be VulkanSDK//macOS/ instead of including . After this change, the setup worked correctly.