Trying to connect to Puck from command line on OSX

No problem, it's fine - I just wondered whether there was a forum bug.

Noble: module couldn't be loaded, no node.js Bluetooth Low Energy
 Error: The module '/usr/local/lib/node_modules/espruino/no­de_modules/xpc-connection/build/Release/­binding.node'
was compiled against a different Node.js version using
NODE_MODULE_VERSION 48. This version of Node.js requires
NODE_MODULE_VERSION 64. Please try re-compiling or re-installing

Well there's your problem :) I guess you had this all installed and then updated Node.js?

Just remove espruino using NPM and re-install, and that should hopefully pull in new library versions and fix it.