Chosen Solution
Can I upgrade the RAM in my Macbook Air (late 2015) from 4GB to 8GB?
Sadly No, The RAM is soldered to the logic board and is not upgradable. Your only choice here is to exchange the logic board with one that has 8 GB which is not economical. It would be cheaper to buy a new system. Review this IFIXIT teardown: MacBook Air 13" Early 2015 Teardown. Jump to Step 7. The red outlined chips are the RAM chips.
Actually, it’s very economical. You can replace the logic board for roughly $200 along with your processor. Drive your computer into the ground, then replace the logic board with 8gb and it’s like having a brand new machine.
Yes you can but it’s a long and dangerous process
Really, it all depends on what year of MacBook you have. Yes, getting a recent model logic board is expensive. And, there are many places that sell refurbished logic boards with faster components than our current model. I suggest doing a thorough search of components for a DIY setup if you’re out of warranty, don’t want to pay for a new machine, and have a knack for unscrewing the cover off and unplugging some wires. Ifixit has some great tutorials.
It all depends on if you are good at BGA chip desoldering and replacement, or are willing to pay someone to do it.
