Once you have downloaded the "fixed" DMG file, you need to create a bootable USB stick. Double-click the downloaded file.

Apple now provides the Mac OS X Lion installer for free directly from their support pages:

Insert the bootable USB into the Mac you want to install Lion on.

If your DMG mounts but the installer says it’s “damaged or incomplete,” the issue is an expired certificate. Do this instead:

files causing failed bootable USB creation.

The original DMG was fragmented or partially downloaded.

To understand why someone is looking for a "fixed" file, one must understand why the original file might be considered "broken."

Many websites hosting these "fixed" legacy files are ad-farms or phishing sites. The download button often leads to adware or survey walls rather than the actual file.