Library of programming functions mainly aimed at real-time vision

OpenCV for Mac

OpenCV 4.9.0

  -  202 MB  -  Open Source

Sometimes latest versions of the software can cause issues when installed on older devices or devices running an older version of the operating system.

Software makers usually fix these issues but it can take them some time. What you can do in the meantime is to download and install an older version of OpenCV 4.9.0.


For those interested in downloading the most recent release of OpenCV for Mac or reading our review, simply click here.


All old versions distributed on our website are completely virus-free and available for download at no cost.


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  • OpenCV 4.9.0 Screenshots

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    OpenCV 4.9.0 Screenshot 1
  • OpenCV 4.9.0 Screenshot 2

What's new in this version:

Core Module:
- added cv::broadcast

DNN module patches:
- Experimental transformers support
- ONNX Attention layer support
- ONNX Einsum layer support
- OpenVINO backend for INT8 models
- ONNX Gather Elements layer
- ONNX InstanceNorm layer
- better support of ONNX Expand layer with cv::broadcast
- Improved DNN graph fusion with shared nodes and commutative operations
- New fastGEMM implementation and several layers on top of it
- Winograd fp16 optimizations on ARM
- Tests and multiple fixes for Yolo family models support
- New layers support and bug fixes in CUDA backend: GEMM, Gelu, Add
- CANN backend: bug fix, support HardSwish, LayerNormalization and InstanceNormalization
- LayerNormalization: support OpenVINO, OpenCL and CUDA backend