Bring a USB drive and a pair of headphones to test every single port on the back.
Turn it on and immediately press and hold the (for Intel) or hold the Power button until "Loading startup options" appears (for Apple Silicon). buying used imac tips
Ideally, you should see the "Hello" setup screen. If the Mac boots straight to a desktop with a password you don't know, walk away. 6. Run Apple Diagnostics Bring a USB drive and a pair of
Avoid iMacs that use a "Fusion Drive" or a standard HDD (Hard Disk Drive). buying used imac tips