Getting Started on macOS


  • Qt package from here or a custom build of Qt 5.12+ (preferably 5.15)

  • A Python interpreter (version Python 3.5+ or Python 2.7). You can use the one provided by HomeBrew, or you can get python from the official website.

  • XCode 8.2 (macOS 10.11), 8.3.3 (macOS 10.12), 9 (macOS 10.13), 10.1 (macOS 10.14)

  • CMake version 3.1 or greater

  • Git version 2 or greater

  • libclang from your system or the prebuilt version from the Qt Downloads page is recommended. libclang10 is required for PySide 5.15.

  • sphinx package for the documentation (optional).

  • Depending on your OS, the following dependencies might also be required:

  • libgl-dev,

  • python-dev,

  • python-distutils,

  • and python-setuptools.

Building from source

Creating a virtual environment

The venv module allows you to create a local, user-writeable copy of a python environment into which arbitrary modules can be installed and which can be removed after use:

python -m venv testenv  # your interpreter could be called 'python3'
source testenv/bin/activate
pip install -r requirements.txt  # General dependencies, documentation, and examples.

will create and use a new virtual environment, which is indicated by the command prompt changing.

Setting up CLANG

If you don’t have libclang already in your system, you can download from the Qt servers:


Extract the files, and leave it on any desired path, and set the environment variable required:

7z x libclang-release_100-based-mac.7z
export LLVM_INSTALL_DIR=$PWD/libclang

Getting PySide2

Cloning the official repository can be done by:

git clone --recursive

Checking out the version that we want to build, e.g. 5.15:

cd pyside-setup && git checkout 5.15


Keep in mind you need to use the same version as your Qt installation

Building PySide2

Check your Qt installation path, to specifically use that version of qmake to build PySide2. e.g. /opt/Qt/5.15.0/gcc_64/bin/qmake.

Build can take a few minutes, so it is recommended to use more than one CPU core:

python build --qmake=/opt/Qt/5.15.0/gcc_64/bin/qmake --build-tests --ignore-git --parallel=8

Installing PySide2

To install on the current directory, just run:

python install --qmake=/opt/Qt/5.15.0/gcc_64/bin/qmake --build-tests --ignore-git --parallel=8

Test installation

You can execute one of the examples to verify the process is properly working. Remember to properly set the environment variables for Qt and PySide2:

python examples/widgets/widgets/