How can I mount an .img file 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


It says 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.