I just got the HTC M8 for Verizon and been trying to unlock bootloader\S-Off running Software number 1.55.605.2 and tried the method and tried the firewater not having any luck. I did get temp root with weaksauce but when I get to last part of "/data/local/tmp/firewater" in cmd it just stays there don't get the options to continue. I do have usb debugging on, the root option or grand over adb was allowed on the phone as well as fast boot on settings Is checked off. Any body have help that can provide or what to look for.
Its not working for me either. The second I do the CHMOD command firewater disappears from the TMP folder.
---------- Post added at 11:02 AM ---------- Previous post was at 10:55 AM ----------
Nevermind, I fixed mine.
I downloaded the ZIP with a whole folder structure in it. This time I just created a C:\ADB folder and moved the ADB and firewater files into it and it worked.