- Install XCode (Check actual version https://xcodereleases.com/)
- Install QT (Try download for open source https://www.qt.io/download/). You need to sign up for download. You will use Online Installer. Choose "Design Tools", "Qt a.b for desktop development" (or other if you want) checkboxes.
- Download https://www.qcustomplot.com/index.php/download
- Try repeat guide https://www.youtube.com/watch?v=dlpNRDVHm8k. (If you will catch an error "undefined symbols for architecture x86_64" you should replay the video from the beginning, because you have missed one very important thing.)
- ...
- Profit.
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