Default [Q] Rooted but can't flash recovery

Hi,

I have the samsung s4 (GT-i9505) and from what I can tell (from SuperSU) I have it rooted. However I cannot flash
clockwork recovery for some reason.

ROM manager states that the current recovery is ClockworkMod 6.0.4.7, yet when I try to reboot into recovery, I get the standard recovery screen and not the clockwork mod recovery.

I used heimdall flash --RECOVERY recovery.img --CACHE cache.img.ext4 to root the phone and unfortunately (as I am on OSX) I can't use odin. Any thoughts on how I can get clockwork recovery mod working?

Thanks in advance!

Nakomi