Windows Phone for Mac: Where do the Backups Go?

I recently had my HTC Radar 4G die on me. It went in to a startup loop in which I would turn it on, the HTC logo would come on, followed by the T-Mobile logo followed by it turning off. I had some photos and videos that I didn't add to my iPhoto library but I did hit the backup button on the Windows Phone app a day before my phone died, so I'm hoping to get those back.

I'm not too concerned with fixing the phone as I already have a new (non-Windows) phone, but if you have any tips I'd be glad to hear them!

Can the backup I made be transferred to a new Windows Phone 8 phone if I had access to one?