Lumix DMC-GX7 to Computer (Mac or Windows) USB Tether

Hi everyone! Thanks for taking the time to read this, so here I go.

I have a shoot in a couple days time and guess what... just bought myself a GX7! I love it so far, but was wondering if I can USB tether it to either Mac or Windows (I have access to both, thanks Bootcamp) for the shoot. I am well aware that it has Wifi and I can tether to my iPad, phone etc. but I really (desperately) want to USB tether to a computer.

What I plan on doing is having the tether automatically save the picture taken on the camera by me and then save it to a specified folder. If I can get this for mac, I already have an Automator workflow to look for any new files added to the folder where the photos are being saved and import them to Aperture. So that is that done. All I need is capability for me to shoot without the crappy and annoying pop up on the GX7 when I connect the USB cable.

Thanks in advance, Nick