I was surprised to learn that the 3.76 GB "Install Mac OS X Lion" file is downloaded to the /Applications folder, not /~/Downloads/. In my case, the file was not visible in /Applications until the download was nearly complete.

The installation file deletes itself after the installation is complete if it is still located in /Applications. To avoid having to download the file again, quit the Lion Installer before proceeding with the installation, and duplicate the installation file or move it to another location. Then relaunch the installer:

Save Your Bandwidth! Prevent OS X Lion Installer From Self-Destructing!.



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