回答“Is it possible to upgrade Memory (RAM) and Storage (SDD) later?”This comment is misleading as the 2015, 2016 and 2017 MacBook Pros can be upgraded in terms of SSD storage, but not RAM. Update (08/21/2020): I give up!!!
回答“How to fix 'static' noise on Bose QC20i Noise Cancelling Headphones?”I had the intermittent crackling/scratching noise on one of my earpieces. After taking apart, I’ve found a small potentiometer that when tapped, made the sound go away. I’ve given it a tiny turn and the cracking has now gone away. I believe this pot is wearing out and causes the scratching type issue. It makes sense as the noise is similar to a worn out pot on a hifi.