How to migrate your old Mac's data to your new MacThanks to Migration Assistant, moving your old Mac's data to your new Mac is as simple as can be.
The Mac line comes with a program called Migration Assistant, which makes it super easy to move data across your computers or even from a Time Machine backup. You can connect two devices using Thunderbolt, FireWire, Ethernet, or even just using the same Wi-Fi network if you don't have the required cable. Migrating your old data to your new computer will make it possible for you to start working on your brand new Mac without missing a beat.
If you are new to Mac, you can also migrate your old PC data.
How to transfer your data from your old PC to your new Mac
Before you start
Update your software - If your old Mac is running OS X 7 (Snow Leopard) or earlier, you will need to update your software first.
Name your old Mac - If you haven't done so already, make sure your old Mac has a name. Open System Preferences > Sharing > and enter a name in the Computer Name field.
Connect you...
Source:
How to migrate your old Mac's data to your new Mac
