Mount .NRG image file on OSX 10.6
Solution 1:
A little googling led me to this thread on MacRumors.com
It appears that if the ISO is a single session CD image you can just knock the first 600 bytes off with a terminal command and it'll be readable as an ISO (change file type to .iso after performing the command).
I'd recommend making a backup of the .nrg file before trying this though!
$ dd if=image.nrg of=cdrom.iso bs=512 skip=600
(↑ credit to balamw on macrumors forums)
Also, If you're just looking to extract pictures from the disk, File Juicer may also be worth a look!
Solution 2:
Had the same experience as the OP. Tried using nrg2iso, tried renaming the file to .iso and also tried the dd
command from that MacRumors thread. Nothing worked.
However, I then found nrg4iso which worked perfectly! The project has been abandoned since 2007 but it still works.
Solution 3:
dd variant not work for me. So, i find another one with poweriso:
http://www.poweriso.com/download.php
Use: ./poweriso convert ~/Desktop/image.nrg -o ~/Desktop/image.iso -ot iso