Spent an hour trying to figure out why my Spark Core does literally nothing (just flashes blue). It’s old, so my best bet right now is to do the deep update. However, dfu-util’s website is down (can’t brew install it). I tried downloading the tar of their source and doing ./configure and make…which work, but now I have no idea what to do next / how to get dfu-util working in the command line so that the update function will recognize it.