Buying a secondhand Mac is a popular way to save money on relatively expensive equipment that retains its value. Conversely, selling your used Mac is a great way to expose yourself to identity theft — unless you follow these steps to keep your personal information safe.

Like it or not, there will come a time when your once lightning-fast Mac computer can no longer meet modern computing demands. When this happens, you’ll face the following dilemma: should you stick to your current Mac computer or purchase a new one? To help you make this decision, we’ve listed several signs you need to watch out for.