create bootable usb mac os x lion dmg file

Create bootable usb mac os x lion dmg file how to#
Create bootable usb mac os x lion dmg file install#
Create bootable usb mac os x lion dmg file download#

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.

Create bootable usb mac os x lion dmg file install#

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. Since this scenario requires reading data from the optical drive, it may perform slower than reading files that are located on the hard drive.If asked to authenticate, enter credentials that have administrator access and click OK to proceed.Select Erase from the confirmation box, if prompted to do so. Upon verifying that the fields are correct, click the Restore button.( If you did not format the USB drive, please follow steps #2-6 from the 10.7/10.8 tutorial above) then continue on to step #5 below. Drag & drop the formatted USB drive partition to the Destination textbox.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) Creating 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.

Create bootable usb mac os x lion dmg file download#

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.

User Account with Administrative privilegesġ.

Apple computer with Mac App Store (OS X 10.6.8+).

Install OS X Mountain Lion.app (installer downloaded from Mac App Store).

Creating a USB Installer for Apple OS X 10.7-10.8īefore proceeding, we’ll need the following items to complete the process: Luckily, Macs have a couple of options, specifically USB booting, and since most have an SD card slot, we can use those as well. Not so easy anymore is it? Even downloading the OS from the Mac App Store wouldn’t do when the hard drive needs replacing or the Recovery Partition is corrupt. Installing OS X has never really been a particularly difficult task, but try doing that on a MacBook Air or a system with a broken optical drive. With the advances in technology, faster data access (SSD), and slimming hardware footprints, legacy technologies are typically the first cuts made to get these devices thinner and lighter while making them more powerful and efficient.

Create bootable usb mac os x lion dmg file how to#

Jesus Vigo goes over the steps to create a bootable USB to install OS X 10.7-10.8 and OS X 10.5-10.6, as well as how to put multiple versions on the same USB. How to create a bootable USB to install OS X