6 Things to do Before Selling or Giving Your Mac Erase personal data before selling your Mac by: TechPP NewsDesk - Last updated on: December 15th, 2020 Key Takeaways Apple devices don’t lose much value even after years, so selling an old Mac is a great way to cover some of the costs before buying a new one. The main thing is not to forget to do a few things before handing over the device to the wrong hands. In this article, we tell you the six most important things you need to do before you sell your Mac to a new buyer.