Get up and running with RNBO
First, open the quickstart patcher by clicking here (if you don't have it open already).
RNBO is all about making patches that you can export. This quickstart patch contains a synthesizer that accepts MIDI notes and generates stereo audio. To export it as a VST, start by double-clicking on the rnbo~ object to open the RNBO subpatcher.
Over on the right you'll see the icon to open the export sidebar. Click to show your different export options.
Double-click on "Audio Plugin Export" to show the configuration for audio plugin export. You can leave all of the default options, but you might want to change the "Plugin Platform" to your OS. The target export will output a folder containing multiple versions of the plugin using different formats, including AU and VST3.
The export button is in the bottom right corner. Click it to upload your code to the cloud compiler and start the export process.
You should see update messages appear through the export process.
When the export completes, you can click the open button at the bottom of the window to reveal your export.
You can drop a VST directly into Max, making a vst~ object. If you want to use your VST in another DAW, you may need to move it into the default system directory. On Mac this is
~/Library/Audio/Plug-Ins/VST3 for VST plug-ins and
~/Library/Audio/Plug-Ins/Components for Audio Units. If you move your plug-in there, you should be able to use your exported plug-in inside of your favorite DAW.