Hi, I'm trying to install TWRP recovery on my AT&T S4, since I need it to flash a Kit Kat ROM. Currently I'm using the CWM-based OUDHS recovery, but I can't seem to overwrite it with TWRP. I've tried installing it with GooManager and with the Casual tool, but, whenever I restart to recovery, I go back to OUDHS. I would try ODIN, but I'm on a mac, and I don't think there's a mac version available. Does anyone have any ideas?