sudo /Applications/Install\ OS\ X\ Lion.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ OS\ X\ Lion.app Replace /Volumes/MyVolume with the path to your USB drive. While directly downloading installesd.dmg for OS X 10.7 Lion might not be straightforward due to the reasons mentioned above, users can still obtain the operating system through official channels or create a bootable installer with tools provided by Apple, if you have legitimate access to the OS. Make sure to only use official methods to obtain software to respect Apple's terms of service and intellectual property rights.