If you have a Mac that runs Mac OS Catalina (released by the end of 2019) the iTunes software does not exist anymore. If you want to install tune files directly on your iPhone/iPad with a simple drag and drop, you must use now the Finder Application. The guide with iTunes becomes somehow deprecated but the general process is very similar.
- Connect your mobile to your Mac with an USB cable
- Open the Finder Application
- Search your iPhone or iPad in the Placeholders (left column)
- Click on the icon
- Wait a little time and you’ll see a buttons bar in the main window
- Choose Files
- An App list appears that includes PocketPipes
- Click on PocketPipes
- You’ll see the personal files inside your mobile (may be empty)
- You just have to drag there your files from any location on your Mac