Mount read-only a Linux ext3/ext4 partition from within Mac OS

http://diesistmein.name/?p=30

or some variation.

Might help: http://osxdaily.com/2014/03/20/mount-ext-linux-file-system-mac/

Read ext4 on Mac

1. install xcode
2. install brew
3. brew install ext4fuse
1. follow any instructions on changing permissions
4. ext4fuse <device> <mountpoint>