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Apple MacBook Pro 15-Inch “Core i7” 2.4 Early 2013 Specs Identifiers: Retina Early 2013 - ME664LL/A - MacBookPro10,1 - A1398 - 2673 https://everymac.com/systems/apple/macbo… The RAM cannot be upgraded. Here are the storage sticks available for your machine: https://eshop.macsales.com/upgrades/macb… Here’s how to install a new one: MacBook Pro 15" Retina Display Early 2013 SSD Replacement