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# 6.3 How can I make my disk images download properly?

Some Web servers have trouble handling plain `.dmg` files, because they don’t know what kind of file they are. When people download the `.dmg` file, it can open in the Web browser instead of mounting automatically. Or, with a bzip2-compressed image, Safari will change the file extension from `.dmg` to `.dmg.bz2`, which causes the OS to think the file is damaged. In order to prevent these problems, make sure that your Web server uses the correct MIME type for `.dmg` files. If you administer an Apache-based server, you can ensure this by adding this line:

    AddType application/x-apple-diskimage .dmg

to your `.htaccess` file.

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