Trying to locate a suitable Android device...

Everytime I try to build to my android I get to "Trying to locate suitable Android device...". Then it just gets stuck and doesn't move and I need to close out of unity. It's not even saying that it can't find a device, it's just getting stuck on "Trying to locate a suitable Android device. I'm using a Mac and a Samsung Galaxy Tablet 8.0. I have my usb debugging enabled on my tablet and i even got a confirmation screen on the tablet that my computer is trying to access it. But still everytime I try to build it gets stuck.