In our last few articles, we’ve given you information on what you need to do before selling (or donating ) your electronics. We’ve covered iPhones and iPads , computers , and Android devices . Today, we’re wrapping up the series with some information on what you should do when it comes time to part company with your Mac. Backup Your Data Step one of getting your Mac ready to sell is the same as step one for the other devices we’ve covered: back everything up. There are a few ways to go about this, but the simplest is to use an external hard drive and Apple’s built-in Time Machine software. Plug in your drive, set Time Machine to perform a backup, and then all you have to do is wait. And if you’ve already been using Time Machine, then you’re in even better shape, since all you need to do is make sure your backup is current. Sign Out of Your Accounts Once the backup is done, it’s time to start signing out of your accounts. You’ll need to sign out of iTunes, iCloud, and (if yo...