How to Install Mac Os X Lion from Usb?

Make a Bootable Mac OS X 10.7 Lion Installer from a USB ...

Plug the USB flash drive into your Mac.
Launch Disk Utility.
Select your USB drive from the left side of Disk Utility, then click on the “Erase” tab.
Choose “Mac OS Extended Journaled” as the Format, and name the USB key what you want.

How do I Reinstall OS X Lion from USB?

Putting a Bootable Lion Installation on a Flash Drive
First, make sure your USB drive is formatted for use with a Mac, then download the OS X Lion installer from the App Store and copy it to your flash drive. Finally, use your bootable flash drive to install Lion on your Mac.

How do I Make a Bootable Mac OS X Mountain Lion Installation USB?

Insert the USB flash drive into the Macs USB port.
Launch Disk Utility , which is located in /Applications/Utilities.
In the Disk Utility window, scroll through the list of devices in the left panel and select the USB flash device.
Select the Partition tab.

How do I Install OS X Lion?

Click the Lion installer Dock icon or doubleclick the Install Mac OS X Lion application in the Applications folder to start the Lion installation process.
Click Continue in the window that opens.
Scroll through the terms of use and click Agree.

Can I Install MacOS from USB?

Using an external drive , you can install or reinstall the Mac operating system on a supported device. To install macOS on these computers, youll need a flash drive that supports USBC or a USB hub or adapter. The file or drive must support Mac OS Extended and have at least 14GB of available storage.