Instead of a traditional disc, customers could now purchase and download OS X directly from the Mac App Store. To create an Apple Mountain Lion bootable USB Installation you will need PowerISO and an Apple OS X installation in ISO format.With the release of OS X 10.7 Lion in 2011, Apple officially abandoned physical media for its operating system installations. Select the disc image to restore on. For OS X Mavericks, see this updated process.Step-6 ( Create Bootable USB drive) Select the USB Drive that you want to make it bootable and finally right click on it and hit on Restore with Disc Image. Confirm that the USB drive will lose it’s data and enter the Admin password when asked Disk Utility will now create a bootable OS X Mountain Lion installer drive out of USB drive using the disk image, this can take a little while depending on how fast the drive and Mac are but 20-30 minutes isn’t unusual.How to create a bootable USB macOS installer The idea behind a macOS Clean Install When you install a new major version of OS X, or after some time has passed, it is a good idea to do a clean install (that is, to erase the disk you are installing OS X onto as part of the installation process).UPDATE: Apple has changed the process for creating a USB installer with OS X Mavericks and the method below no longer works.Step 3: Right click on the downloaded file and select Show Package Contents. Step 2: Once downloaded, go to the Applications folder and find the copy of Lion you just downloaded. Step 1: Download OS X Lion from the Mac App Store. A general.How To Make OSX Lion Bootable USB Flash Drive. Regardless of the operating system you are using, booting your machine from USB media does not need to be difficult.
Make A Bootable Usb For Os X Install A New![]() Quit it by pressing Command+Q we don’t need the installer application, just what’s inside it.Open Finder and navigate to your Applications folder. Once it’s complete, the OS X Installer will automatically launch. Find your desired version of OS X in the list and click the “Download” button to the right.OS X is a multi-gigabyte file so the download process may take a while depending on your connection speed. Best dolphin emulator button setup 50 for macAn external hard drive is also an option, although you’d want to create a partition specifically for the OS X Installer so as not to waste the entire drive’s capacity. A USB drive is fast and durable, but you can also burn the image to a bootable dual-layer DVD. Copy it from the installer package to your Desktop.Now you’ll need to decide what you’d like to use for your installation media. This is the disk image we’ll need to create a local OS X installation disc or USB drive. Right-click (or control-click) on this file and select “Show Package Contents.” This will reveal the “guts” of the Installer’s application package.Drill down to Contents > SharedSupport and find the “InstallESD.dmg” file. Drag the InstallESD image from your Desktop and drop it over the Source box, then drag the USB drive from the list in Disk Utility and drop it on the Destination box.This is telling Disk Utility that we want to take the contents of the OS X Installer image and copy it exactly to our USB drive. You’ll see two fields: Source and Destination. Find your target drive in the list on the left and select the “Restore” tab on the right. Create an OS X Install DVDTo create an Install DVD, insert a blank dual-layer DVD and open Disk Utility. Enter it and then sit back and wait for the restore to complete. Disk Utility will then ask for an administrator password. Disk Utility will warn you that this process will delete the contents of your USB drive and ask you for confirmation. ![]()
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