Download from release, or build it yourself:

1. Clone this repo to you mac
2. Make sure you have brew installed, otherwise visit: https://brew.sh/
3. Open terminal, execute command line by line:
   brew install python3
pip3 install -U PyQt5 py2app whoosh lxml mp3play PyObjC
cd ldoce5viewer
python3 setup.py py2app # now you should have LDOCE5 Viewer.app under folder dist
   cd dist/LDOCE5\ Viewer.app/Contents/Frameworks/QtWebEngineCore.framework/Helpers/QtWebEngineProcess.app/Contents
ln -s ../../../../../../../Frameworks .
cd -
4. Check if your new build is working by launching it from command line, if not it will tell you why:
   ./dist/LDOCE5\ Viewer.app/Contents/MacOS/LDOCE5\ Viewer
5. Relocate your build if it works: mv ./dist/LDOCE5\ Viewer.app /Applications

All credits go to the original author.