Get fastboot and adb. Download newest twrp img file. Boot to bootloader and click fastboot. Load terminal on Mac and navigate to directory with fastboot and img.
Fastboot flash recovery twrp.img
Pm me if you need more help.
Sent from my HTC One_M8 using XDA Premium 4 mobile app
Last edited by an0ther; 3rd July 2014 at 02:29 AM.