Kirk McElhearn, Intego blog:
Your Mac contains a lot of personal information, and is connected to a number of Apple accounts. When you plan to dispose of your Mac — whether you sell it, give it away, or send it for recycling — there are a number of things you should do to make sure your data and your accounts remain secure. There are also a few steps you need to take to remove that Mac from Apple’s accounts.
In this article, I go over the 8 steps you should take before getting rid of a Mac.