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  • How to make DMG file on Mac

    Posted on June 23rd, 2010 Sean 2 comments
    1. Create a new folder and copy the files you want in the DMG image into this new folder.
    2. Choose this new folder, and on the top menu bar click: File -> Get Info, find the size of this folder (e.g. 49.2 MB)
    3. (click pics for bigger view)

    4. Open “Disk Utility”, go to Applications -> Utilities -> Disk Utility
    5. Click the “New Image” icon to create a new disk image, enter a name for the image, and select a size adequate for the size of your folder you created in step 2 (usually should be little bigger, e.g. 50 MB here). Set the encryption to “none” (if you don’t want set password for it) and format to “read/write disk image”
    6. (click pics for bigger view)

    7. Place the contents of the folder created from step 2 into the newly mounted disk image
    8. (click pics for bigger view)

    9. Unmount the disk image after copy done, the DMG file is what to you want
    10. Option: Go to “Disk Utility” again, choose the image file and click “Convert”, then set “Image Format” to “read-only”.
      (This step just make your disk image can’t be modified in the future)
    11. (click pics for bigger view)

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