


Select the USB flash drive volume from the left side list and drag it to the Destination entry field.Check the box labeled Erase destination.Click on the Restore tab in the DU main window.Select the USB flash drive from the left side list.You are going to clone the InstallESD.dmg disc image to the flash drive as follows: Plug in your freshly prepared USB flash drive. In this folder you will see a disc image named InstallESD.dmg.Ĥ. Double-click on the SharedSupport folder. Double-click on the Contents folder to open it. CTRL- or RIGHT-click on the installer and select Show Package Contents from the contextual menu. Locate the saved Lion installer in your Downloads folder. The format process can take up to several hours depending upon the drive size.ģ. Set the format type to Mac OS Extended (Journaled.) Click on the Options button, check the button for Zero Data and click on OK to return to the Erase window.Click on the Erase tab in the DU main window.


After downloading Lion you must first save the Install Mac OS X Lion application. If you have your own bootable USB Lion flash drive, then the reinstallation will take place from the flash drive. If you boot from the Recovery HD then the reinstallation is by Internet. You can install Lion onto a 16 GB USB flash drive in which case the installer will include a Recovery HD partition.ģ. For example you can use the Lion Recovery Disk Assistant - OS X Lion: About Lion Recovery Disk Assistant - to put a Recovery HD volume onto a small USB flash drive with at least 2 GBs of space. You can boot from any Recovery HD regardless of its location provided it's connected.
