We've been getting a few calls from GoPro HERO owners whose software updates fail when they try to install them. Once that happens, they can no longer access their cameras or run the update again.
GOOD NEWS! It turns out that (in most cases) this is the result of a corrupt MicroSD card. If you replace the card with a new (or known good) card this should fix the issue.
Check out this thread on GoPro's website for more details:
And if that doesn't work, feel free to let us know! We're a licensed repair center located in Los Angeles with mail-in, pick up, and drop-off options for your GoPro cameras and Macintosh computers!