Use a service that offers purchase protection like PayPal or eBay
Test it out; boot it up and test before closing the deal. If you run into this type of error, walk away.
Boot it from a completely off state. If the machine is running and “waiting” for you, it could be a sign of trying to obfuscate issues. Shut it down completely and boot from off. For instance, they may have booted into Safe Mode, obscuring any issue that might occur during a normal boot
Test everything while on battery.
- There are keyboard test sites (https://www.keyboardtester.com/) or you can use Karabiner Elements (it has an event viewer) this will help you ensure the keyboard is good (You can also try
xev
but it requires XQuartz to be installed (both are free) - Memtest86 is free and you can boot it off a USB drive
- DriveDx is free for diagnostics (pay for data recovery) and is an excellent tool to test out the storage
- There are keyboard test sites (https://www.keyboardtester.com/) or you can use Karabiner Elements (it has an event viewer) this will help you ensure the keyboard is good (You can also try
Check the battery stats. You can do this from Terminal without extra software. Issue the command:
$ system_profiler SPPowerDataType | grep -i "charge information" -A 10
See the link for sample output. If it's brand new it won't have a bunch of cycles (should be in the single digits) and the "max charge" and "charge remaining" shouldn't have much of a delta if the battery's fully charged.
system_profiler SPPowerDataType | grep -i "charge information" -A 10
See the link for sample output. If it's brand new it won't have a bunch of cycles (should be in the single digits) and the "max charge" and "charge remaining" shouldn't have much of a delta if the battery's fully charged.
(I can't stress this enough) If this is an in-person transaction, do this at a police station. Some even offer a well lit, camera monitored space in the the front parking lot to do the exchange. If your seller balks at this, you'll know something's not right and should walk from the deal.
(I can't stress this enough) If this is an in-person transaction, do this at a police station. Some even offer a well lit, camera monitored space in the the front parking lot to do the exchange. If your seller balks at this, you'll know something's not right and should walk from the deal.