If you are the one buying a used Mac from a third party, experts on Reddit and Medium suggest these checks: 5 Things to check before buying second hand Macbook
: Apple Trade In allows you to swap your device for credit toward a new purchase or an Apple Gift Card. If it has no value, they will recycle it for free. we buy macs
Before handing your Mac over to a buyer, Apple Support recommends these critical steps to protect your data: If you are the one buying a used