![]() This will install the version of OS X that came originally with the computer (10.7.4.) You may then upgrade it back to Mavericks by re-downloading the Mavericks installer from the App Store. ![]() If possible because it is three times faster than wireless. Note : You will need an active Internet connection. If the Scheme pop-up menu isn’t available, make sure you selected the storage device you want to eraseit’s at the top of the hierarchy. Click the Scheme pop-up menu, then choose GUID Partition Map. Be sure to select the correct drive to use if you have more than one. In the sidebar, select the storage device you want to erase, then click the Erase button. Mavericks : Select Reinstall Lion/Mountain Lion, Mavericks and click on the Install button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed. 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. Click on the Partition tab in the DU main window.ģ. After DU loads select your external hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Select Disk Utility from the main menu and click on the Continue button.Ģ. Wait patiently - 15-20 minutes - until the Recovery main menu appears.ġ. Restart the computer and after the chime press and hold down the COMMAND-OPTION- R keys until a globe appears on the screen. Install Mavericks, Lion/Mountain Lion Using Internet Recoveryīe sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard drive.
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