I am trying to install Sims 3, but it opens a window saying that "The following disk images couldn't be opened because the image data was corrupted." What can I do to resolve this issue?
MacOS – What do I do if the disk image data is corrupted
dmgmacos
Related Solutions
This is exactly what a dmg does.
To create one use Disk Utility and hit the New Image icon. Then choose the size, encryption and choose the image format as one of the sparse images. Even if you choose a large size it will only take up space according to what you save in it.
.dmg files are disk images, similar to an .iso file.
You can think of them like a virtual CD. You put it into the CD drive (mount it), and its contents appear on your computer.
When used for software downloads, they are simply a way to bundle up files, like in a ZIP archive. Their advantage is that it's possible to customize the design (e.g. Finder window background and icon positions, see example below).
The actual program is in a special bundle or package directory with the usually invisible extension .app. It contains an application's resources, like image files, and the actual binary (the ".exe equivalent") that is executed when you start the program. If you want to compare it to a Windows equivalent, the closest would probably be the folder in C:\Program files\ created by a program's installer.
To install such an application from a disk image, you drag and drop it to your hard drive, e.g. the Applications directory. That's what a lot of disk images try to convey in their disk image design: You grab the application, Adium in this case, and drag it onto the Applications folder:
Related Question
- In Disk Utility, what advantages do “read/write disk image”s have over “sparse bundle disk image”s
- MacOS – How to mount a DMG image created with dd
- MacOS – Add/Delete/Modify files within a Disk Image (.dmg)
- MacOS – I have El Capitan and can not install a DMG file
- MacOS – The document “Example.dmg” could not be opened. Disk Utility cannot open files in the “Disk Image” format
- Create disk image which can be read on Windows
- How to restore a disk image to source disk using Disk Utility
Best Answer
The error message means that the downloaded file is corrupt and can't be opened.
Re-download it and try opening it again. If it fails again, make sure that the download isn't being interrupted.
If you can obtain a checksum for the file, you can check it against your download by running
openssl sha1 ~/path/to/downloadwhich will show the checksum for your download. Comparing the results should show if the file you downloaded matches what you should expect to download.