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A missing, modified or corrupt file could result in an unreliable installation. This is important as the OS X installer is looking for specific files at specific locations during installation.
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**Note: Feel free to include any additional files or folders to the existing drives, so long as the original file hierarchy is not modified in any way. Loss/theft of USB drives and any additional data, such as configurations, passwords, etc.Choose the highest read and write speeds for your particular application to minimize this bottleneck. Read/Write speeds vary wildly depending on the make/model of the USB drive.Writable means live data can be subject to accidental deletion or corruption.Include multiple versions of OS X on the same drive.**.Backup directories prior to initializing the HDD and/or reinstalling OS X.**.Include additional resources on the drive that are required by your organization, such as Combo Updaters, applications or settings.Remember, this being a writable drive offers some additional perks over read-only media with a few caveats as well.
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Once completed, the USB drive will be bootable and have the full installation of OS X on there to install from scratch and update systems, as needed.
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Click on the Restore tab and verify that the Mac OS X Install DVD appears in the Source text box.Launch Disk Utility and click on the OS X Install DVD from the left-hand menu.Insert Apple OS X Install DVD into Optical Drive.The process has not been tested with Restore DVDs and may not yield a reliable, OS X Installer USB. *Note: Install DVD must be the original DVD from Apple and not a Restore DVD that came with earlier model Apple computers & laptops. User account with Administrative access.The process is nearly identical, with a few alternate items to complete the process: ( Figure G)Ĭreating a USB Installer for Apple OS X 10.5-10.6 The process may indicate in excess of one hour, but in my experience the process takes significantly less time to complete. Upon verifying that the fields are correct, click the Restore button and select Erase from the application, if prompted to do so. For Destination, drag & drop the partition created on the USB drive onto the textbox. In the Source textbox, click the Image button and select the InstallESD.dmg file on your Desktop. Go back to Disk Utility and click on the newly formatted USB Drive in the menu, then click on the Restore tab.ġ0. Navigate the file structure Contents | Shared Support and drag the InstallESD.dmg file to the desktop. Right-click the file and select Show Package Contents.
Upon completion of the USB formatting, locate Install Mac OS X Mountain Lion.app (downloaded in step #1 to the Applications folder, by default). Click on the Options button and select the radio button for GUID Partition Table and click OK. Select Mac OS Extended (Journaled) for the format-type from the drop-down menu. Click the drop-down menu, selecting 1 partition.ĥ. Click on the USB drive from the left-hand menu and select the Partition tab.Ĥ.
Insert the USB drive into the Mac and launch Disk Utility.ģ.
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Using a Mac with at least OS X 10.6.8 installed, access the Mac App Store and download the Lion (10.7) or Mountain Lion (10.8) app installer.Ģ.