Mac Transfer. Heres how it compares to apples intel based mac pro tower. Once the migration assistant is opened click continue.

In the from drop down list select the old mac disk that you want to clone. The easiest way to do that is by using a connecting cable and an adapter. To transfer files from old mac to new one you need to first connect both the systems.
You can use finder on newer mac to transfer the songs via usb connection or over wi fi.
Here you can type migration assistant on the search field then the app will appear in no time. Itunes makes it easy to sync your library to iphone. On the new mac launch migration assistant by opening finder pane click applications. Back on your new mac you should see a list of devices you can restore from.