
Before you wipe your data, make sure to deactivate any applications that need activating so they can run on your new machine. Some applications, such as iTunes and Adobe (s adbe) products, require each of your computers to be authorized to use them. It’s a good idea to make sure you have a large capacity external drive if you’re doing this: one that has more than enough room for your files. You can do this with a utility such as Carbon Copy Cloner, which copies a drive’s contents to another volume to keep them safe. Or, if you’re not sure what you should keep, go whole hog and backup your entire hard drive. I’d suggest at least making copies of your Documents and Photos folders, since they’re the folders most likely to contain important files.

If you have an external hard drive, that makes it easy, but if you’re only copying text documents or small numbers of photos, even a USB flash drive might be enough. What would you do if you sat down at your new computer one day and realized a desperately important file was still on your old hard drive? In order to prevent from happening, you should make a backup of at least your most important files. I’m currently going through the process of preparing my machine to replace it with a new MacBook Pro, so follow along with me as I make sure the process is as painless as possible for both me and my Mac’s (s aapl) next owner.

If you’re planning on buying a new machine, it’s a great idea to sell your old Mac to cover some of the new computer’s cost.
