Default Nexus 10 not detected in fastboot.

I was on 4.4.4 stock with bootloader unlocked. I flashed custom recovery from fastboot and rebooted into CWM. It was all fine till this point. On next reboot, It booted in OS all fine. I did adb reboot recovery and it got stuck at "No command" screen. waiting a long time ons creen it booted into OS.

I reboot into fastboot to reflash CWM and check but it wont detect my device in fastboot devices. I'm on OS x. I even tried windows (drivers installed) , its the same. fastboot is stuck at "waiting for device".

ps. I installed "recovery-clockwork-touch-" from
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