How to Check a Mac by Serial Number Before Buying Used
Macs are easy to overlook, but a used Mac can be locked to a previous owner just like an iPhone. Two checks before you buy keep you safe.
Activation lock on Mac
If Find My Mac was on, the device is tied to the owner's Apple ID and cannot be activated by you. Run the Mac Activation Lock Check to confirm it is clear.
Warranty by serial
A serial lookup shows the Mac's purchase date and remaining coverage. Use the Apple Warranty by Serial Check to see how much protection is left.
Cellular Macs: if the Mac has a SIM (like some MacBook Pro models), the Full IMEI Check also reveals network and blacklist status.
Bottom line
Never buy a used Mac you cannot activate. Confirm activation lock and warranty by serial before any payment.
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