: Go to Apple Menu > System Settings > General > About > System Report > Power . Under 300 cycles : Excellent condition.
: Open a full-screen white background to check for dead pixels, lines, or spots. For newer models, verify if True Tone is available in Settings; if it's missing, the screen has likely been replaced with an inferior third-party part. tips for buying a used macbook
: Expect reduced runtime; 1,000 is typically the limit where Apple recommends replacement. : Go to Apple Menu > System Settings
: Test every single key for responsiveness. Be particularly cautious with models from 2016–2019 , which use the failure-prone "butterfly" keyboard. or spots. For newer models