Harmony includes it's own scripture features but can also integrate with Accordance Bible from OakTree Software. Accordance is a popular Mac software package for bible study.
If you are purchasing Accordance for use with Harmony, we recommend starting with the starter edition or the Mac App Store version of Accordance and then only purchasing the translations you need. Most of the modern copyrighted translations are priced at $30.
Harmony does not require any special setup other than Accordance be installed on the same computer. If Harmony detects Accordance, it turns off it's own scripture translations and defers to using the scripture translations in Accordance.
If you purchased Accordance directly from OakTree, download the application from http://www.accordancebible.com/downloads/program_installers.php
Translations can be downloaded from http://www.accordancebible.com/downloads/purchased_modules.php
When you run an Accordance installer you will be prompted for unlock codes which are supplied in your electronic receipt when you make an Accordance purchase.
Accordance supports many translations. Here are direct links to some of today's most popular.
If you add translations to Accordance and Harmony does not recognize the additional translations, update Harmony using the Refresh translations option in the Harmony menu.