Unlike a new machine, a used Mac's most critical "consumables" have already been partially used:
: Expect reduced runtime; 1,000 is typically the limit where Apple recommends replacement. tips for buying a used macbook
: Use a tool like DriveDx to check the total data written (TBW). If the SSD is heavily worn, the entire machine is at risk since storage is soldered to the board on modern Macs. Unlike a new machine, a used Mac's most
: Test every single key for responsiveness. Be particularly cautious with models from 2016–2019 , which use the failure-prone "butterfly" keyboard. Unlike a new machine