Mid 2012 Macbook Air Memory Replacement Macbook Air 13 Mid 2012

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where can I find mid 2012 macbook air memory upgrade step by step instructions?

You cannot upgrade the RAM on a MacBook Air. It is soldered in place. (Src: https://everymac.com/systems/apple/macbo…) If you have the 4 GB model, you can buy a 8GB logic board (MacBook Air 13" (Mid 2012) 1.8 GHz Logic Board) and replace it, using the step-by-step instructions at ifixit. Here is a link: MacBook Air 13" Mid 2012 Logic Board Replacement