

When the clone is completed you have a fully bootable Lion installer that you can use without having to re-download Lion. Double-check you got it right, then click on the Restore button.Drag the InstallESD.dmg disc image file into the Source entry field.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. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list.Click on the Partition button and wait until the process has completed. Set the format type to Mac OS Extended (Journaled.) Click on the Options button, set the partition scheme to GUID then click on the OK button. Under the Volume Scheme heading set the number of partitions from the drop down menu to one.Otherwise, click on the Partition tab in the DU main window. SMART info will not be reported on external drives. If it does not say "Verified" then the drive is failing or has failed and will need replacing. Note the SMART status of the drive in DU's status area. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list.Open Disk Utility in your Utilities folder.Get a USB flash drive that is at least 8 GBs. You must do this because the installer deletes itself automatically when it finishes installing Lion.Ģ. Move the copy into your Downloads folder. Go to your Applications folder and make a copy of the Lion installer.
#Reinstall mac os x without disk install
After Lion downloads DO NOT click on the Install button. When the Recovery window appears, select Disk Utility then click Continue. You can use these steps to erase the files on your startup disk and install a new copy of OS X: Before you begin, make sure your Mac is connected to the Internet. After downloading Lion you must first save the Install Mac OS X Lion application. 14 points Followed the following steps and now trying to reinstall OS X but no disk appears. After you capture the installer then you can make a bootable flash drive:ġ. See the following: Downloading Hardware Specific Lion Installers.
#Reinstall mac os x without disk download
In order to do that you need to download the installer for your model. You cannot unless you make your own bootable flash drive.
