QGIS 3 is finally ready! As noted previously for GDAL 2.2, big packaging changes include minimum OS X Yosemite and Python 3. Also note that during installation it needs internet access to install the necessary Python modules. QGIS 3 installs as “QGIS 3.app”, so it can be used alongside QGIS 2.
Currently it is missing the globe plugin, I’ll work on adding that next. But it does include the new 3D features.
I’ve done little testing in my rush to get this ready. …argh, looks like the SAGA Processing provider is not working.