Install QT5 SDK on Mac OS X
The Linked Guides Shows You Step-by-Step How-to Download, Install and Getting-Started with the QT5 SDK Open-Source Development Environment for Mac OS X Computers.
The Qt5 SDK includes the tools you need to build desktop, embedded and mobile applications with Qt from a single install.
This is also the Recommended way to getting started with Qt5 Development.
The latest SDK has a self updater feature that will keep you up to date as new versions are made available.
To the Qt5 SDK Installation Mac Sierra Bottom there is a Link to Quick Getting-Started with QT5 SDK Development on Mac.