I'm trying to do this tutorial, but I can't mount the img file:
sudo mount -o loop,offset=62914560 2015-05-05-raspbian-wheezy.img /mnt/rasp-pi-rootfs
mount: You must specify a filesystem type with -t.
How can I mount an image in OSX?
It looks like you try to mount a linux file system
raspbian-wheezy.img like ext2/3/4, xfs. OS X does not support these file systems. There's an ext plugin for FUSE which might enable you to add support for the file system you want.