Back up any existing data on the flash drive, as it will be entirely overwritten. Formatting the Drive via Disk Utility Mac OS X Lion Installer - Apple Support (SA)
For "Source," select the mounted "Mac OS X Install ESD" volume. For "Destination," select your USB drive partition. Click .
When Apple released OS X 10.7 Lion in July 2011, it broke tradition by omitting physical DVD distribution. Instead, it launched exclusively via the Mac App Store. Within the digital download package ( Install Mac OS X Lion.app ), Apple hid the core operating system inside a file called (Electronic Software Delivery). mac lion os x 10.7 - installesd.dmg download
: Inside the mounted image, double-click InstallMacOSX.pkg . Follow the onscreen prompts.
The included Safari version will not work with modern websites. Install a legacy-compatible browser. Need Help with Other Legacy Mac Systems? Back up any existing data on the flash
You can download the Mac OS X 10.7 Lion installer directly from Apple for free . To obtain the specific InstallESD.dmg
Use a standard web browser (preferably Safari) to navigate to the official Apple Support macOS Downloads Page . Within the digital download package ( Install Mac OS X Lion
Select and point it to the InstallESD.dmg file.