Note the use of sudo dd, without which I got a permissions error.
#Handbrake for mac 10.7.5 32 bit download iso
Which then produced an ISO file that I could then just double click to mount. Sudo dd if=/dev/disk2s0 of=~/RHDisk.iso bs=2048 Instead, I found that I had to specify the slice number, in addition to the disk number, i.e. When double clicking the resultant ISO file, the DiskImageMounter utility gave the following error message: Produced an ISO that was not, thereafter, mountable 1.
#Handbrake for mac 10.7.5 32 bit download install
On Catalina, when trying to copy an old RedHat 6.2 install CD I found that using diskutil unmountDisk /dev/disk2 iso files are only readable but not writeable, and if one month later you issue a dd command that might overwrite an existing file, it actually will come back with a "Permission denied" error so that you won't overwrite that existing file. In addition, since dd can overwrite any existing file, so you might want to do chmod 444 *.iso so that all. diskutil eject /dev/disk1 is to eject the disc for some optical drive that won't let you eject manually but requires OS X to eject the disc.
It will take a while and you will see the optical drive's light blinking, if the drive has such a light.
So if you burn a new disc with this image it will not play on a standard DVD player. But if the disc is copy protected, it contains decryption keys in the lead-in area of the disc which cannot be read directly, and are not part of the ISO image. As mentioned in other answers you can use Disk Utility or dd to create an ISO image of the original disc.