Apple has a Migration Assistant app to help you move your data to a new Mac, except it isn’t always smooth, isn’t always easy — and isn’t your only choice.
If only Macs were as easy to transition between as iPhones. When you upgrade an iPhone, you put the new one next to the old and it practically transfers itself.
With the Mac, it can be close to that, because of Setup Assistant and Migration Assistant. In theory, you run these on both the new and the old Mac, and the sole difference is that Setup Assistant only appears when you first switch on the new Mac.
Read more at AppleInsider.com