To look up specifications for Mac computers via serial numbers, access the Ultimate Mac Lookup section on EveryMac.com, and type the serial number in the Mac Identifier field. As of 2015, EveryMac.com supports multiple identifiers, including order, model, serial and EMC numbers.
Typing in the serial number and clicking on the Lookup button reveals the name of the model and its key specifications, such as the type of optical drive, the amount of system and video memory, and available storage space. To view the complete list of specifications, click on the model name link, open the Tech Specs tab, and click on Expand All Details. In addition to specifications, these pages also include a detailed description of the selected model and a link to the user manual in PDF format.