#ENABLE DISC IMAGE TOOLS DOWNLOAD#
#ENABLE DISC IMAGE TOOLS MAC#

Questions? Comments? Have a fix? Post them below orīe sure to check us out on Twitter and the CNET Mac forums. To undo this option simply rerun the Terminal command and change the '1' to a '0,' and then quit and relaunch Disk Utility. To enable this, simply open the OS X Terminal and run the following command:ĭefaults write advanced-image-options 1Īfter running this command, instead of only seeing 'CRC-32' as the checksumming routine, you will have options for MD5, various SHA algorithms, and iPod and Disk Copy algorithms.Īs with the CRC-32 checksum, you simply need to select any one of these, and then choose the desired disk image in the Open window, after which the checksum will be computed and presented to you. However, even though Disk Utility only shows CRC-32, it does have hidden support for other checksum routines. Having only one option may be a bit limiting, especially since other checksums like MD5 and SHA are commonly used. When selected, you can then locate and choose your desired disk image, and have Disk Utility compute and present the checksum result for you. There are a number of checksumming routines commonly used for providing integrity checks for disk images and other files distributed on the Internet, but Disk Utility by default only offers CRC-32 checksums as its sole option, which can be accessed in the Images > Checksum menu. A number of additional checksumming options will be available after enabling the hidden Disk Utility preferences setting. Click the Image Format pop-up menu, then choose an option: Sparse bundle disk image: Same as a sparse disk image (below), but the directory data for the image is stored differently. Click the Partitions pop-up menu, then choose a partition layout. If these do not match, then chances are the file was altered from the intended version supplied on the site. To encrypt the disk image, click the Encryption pop-up menu, then choose an encryption option. LSOFT may make improvements or changes in the product (s) and/or the program (s) described in this documentation at any time.

#ENABLE DISC IMAGE TOOLS DOWNLOAD#

Sometimes when you download a disk image from a Web site, the site will mention a checksum for the image that you can compare to a locally computed checksum. provides this documentation without warranty of any kind, either implied or expressed, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. One component of this program's image handling features is the ability to compute a checksum to verify the image's integrity. Disk Utility is Apple's tool for managing disks and disk images in OS X.

Enable disc image tools