Redownload the Lion installer app. Do not run install.
Copy the app to a USB thumb drive. Then, on each of
the machines you want to install Lion on, copy the installer
to the Application folder and then launch the installer from
I have used this procedure on my 4 macs without any
FYI, from the Lion license for Mac App store purchase or
B. License from Mac App Store or on Physical Media. If you obtained a license for the AppleSoftware from the Mac App Store or on Apple-branded physical media, then subject to theterms and conditions of this License and as permitted by the Mac App Store Usage Rules setforth in the App Store Terms and Conditions (http://www.apple.com/legal/itunes/ww/) (“UsageRules”), you are granted a limited, non-transferable, non-exclusive license:
to download, install, use and run for personal, non-commercial use, one (1) copy of theApple Software directly on each Apple-branded computer running Mac OS X Snow Leopardor Mac OS X Snow Leopard Server (“Mac Computer”) that you own or control;
(ii) If you are a commercial enterprise or educational institution, to download, install, use andrun one (1) copy of the Apple Software for use either: (a) by a single individual on each of theMac Computer(s) that you own or control, or (b) by multiple individuals on a single shared MacComputer that you own or control. For example, a single employee may use the AppleSoftware on both the employee’s desktop Mac Computer and laptop Mac Computer, ormultiple students may serially use the Apple Software on a single Mac Computer located at aresource center or library; and
(iii) to install, use and run up to two (2) additional copies or instances of the Apple Softwarewithin virtual operating system environments on each Mac Computer you own or control thatis already running the Apple Software.
The grant set forth in Section 2B(iii) above does not permit you to use the virtualized copiesor instances of the Apple Software in connection with service bureau, time-sharing, terminalsharing or other similar types of services.
Which can be found here: