WBFS Manager for Mac Os X Issue loading ISOs

Normally the program seems to work fine but I have to larger file games, Super Smash Bros Brawl and Skyward Sword that it seems to be having an issue with. It starts to load and gets to about 80 to 90% then stops and acts like it's finished. At first I thought I didn't have enough room so I got a 32gb usb flash drive and it's still doing the exact same thing. I'm running 4.3, any ideas why this might be happening? Also any other programs to load an iso to a usb drive for mac would be really helpful.

It seems like a bug in the program.

Try this one.

You'll need a program like uTorrent to get it, though.