Don't try to upgrade the RAM on an M-series MacBook Air.

No, you can’t. The unified memory isn’t just soldered onto the board—it’s physically part of the M1 package itself. The LPDDR4X chips are stacked on top of the main SoC die. Desoldering them means destroying the whole chip.

Even if you found a way to remove and reball RAM, the memory controller is integrated into the M1’s fabric, and the firmware has the exact capacity locked in. No amount of soldering changes that. A few repair shops have done it on older Intel MacBooks, but the M-series architecture makes it a waste of time and money.

If you need more RAM, buy the right configuration upfront. Future-proofing on a MacBook Air means maxing out RAM at purchase—eight gigs is already tight for most people.