Hello, I just got a s340 as well and would appreciate any help. I found a config.plist which gets me booting Mojave with graphics ok, but no touchpad, sound, not sure what else it broken but I'm trying to decide whether to keep this one or a 330s I also picked up recently used. The s340 has a backlit keyboard and better CPU, but I'm afraid I won't be able to get it working as well as the 330s which I've got everything working perfect including wifi, bluetooth, trackpad, webcam, cardreader, sound & graphics.