![]() Creating a blank disk image is an effortless process on a Mac, and the following guide should help you create one. If you wish to create a disk image for your file storage, you may want to create a blank one. ![]() That feature distinguishes it from the other file types. ![]() On Linux you could use the losetup command to associate the image file with a device like /dev/loop0 ( mount -o loop does this for you, but OS X's mount manpage doesn't indicate any similar option).In Mac OS X when you double-click a disk image, instead of launching like an app, it gets mounted as a volume on your machine and can be accessed as if you were accessing an external hard drive. Depending on how you created it (did you dd a partition or a whole drive?) you may be able to double-click on the image file, or you may need to give the file the right file extension (.iso or. This suggests to me that your OSX system needs to recognize your image as a valid HFS image. It can handle disk, CD-ROM or DVD images in various formats. In the user interface it is automatically activated by opening the disk image. The devices appear in /dev as regular disk devices reads from and writes to those devices are sent to a user-mode helper process, which reads the data from the file or writes it to the file. Mac OS X implements a native image mounting mechanism as part of its random access disk device abstraction. What you're trying to do is known as "loopback mounting", that is, mounting via the loop device. According to one source, you need hdiutil (OSX hdiutil manpage), as in hdiutil attach -readonly cdimage.iso
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