Installing Mountain Lion From Usb' title='Installing Mountain Lion From Usb' />How to Make a Bootable OS X 1. Mountain Lion USB Install Drive. OS X 1. 0. 8 Mountain Lion will be offered exclusively through the App Store, familiar territory for Apple since OS X Lion was provided the same way. Thankfully its still possible to create a bootable OS X 1. Mountain Lion installer from any USB drive, be it a flash key or external hard drive. By creating a bootable install drive, you can perform clean OS X 1. OS X Mountain Lion on Macs that dont have internet connections. Gatekeeper is a security feature of the macOS operating system by Apple. It enforces code signing and verifies downloaded applications before allowing them to run. Please Read Before Watching This Tutorial is for installing Mac OS X Lion 10. Leopard. Now you can update to Mac OS X Lion directly from Leopard 10. Type devalias ud htpci2usbbdisk2. In other words make ud equal to the path you found in step 9. Now verify you got the right disk. See if your Mac is ready for macOS High Sierra, the latest version of macOS. And find out how to quickly and easily upgrade. Well walk through the process here, but dont forget to check OS X 1. Mac before beginning. If you already have the Mac OS X Mountain Lion install DMG extracted, skip this first set of steps and jump directly to making the bootable drive below. Windows No driver installation is necessary for Windows 10, 8. The operating system will download the. Download OS X Mountain Lion and Extract the DMG File. Download OS X 1. 0. Mountain Lion from the App Store Go to the Applications directory and right click on Install Mac OS X Mountain Lion. Show Package ContentsOpen the Contents directory and then open Shared. Support, looking for a file named Install. ESD. dmgDouble click on Install. ESD. dmg to mount it on the desktop. Make the OS X Mountain Lion Install Drive. Launch Disk utility and connect a USB drive to the Mac. Select the USB drive from the left menu and click on Erase tab, choose Mac OS X Extended Journaled as the format, then click on the Erase button in the corner. Now select the formatted USB drive from the left side and click on the Restore tab. Drag the previously mounted Mac OS X Install ESD image into the Source section. Fujitsu Lifebook Recovery Cd. Drag the formatted partition to the Destination section, then click on RestoreConfirm that the USB drive will lose its 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 2. Installing Mountain Lion From Usb' title='Installing Mountain Lion From Usb' />When finished, reboot the Mac and hold down the Option key to bring up the boot menu Select the orange Mac OS X option and you will boot into the OS X Mountain Lion installer, from here installation is the same as normal. Click on Continue, select the destination drive, and install. Make a Bootable Flash Installer of OS X or mac. OS. With help from Terminal and a super secret command included with the Mac OS installer, you can create a bootable installer to use for all your Macs. Screen shot courtesy of Coyote Moon, Inc. The process of installing OS X or mac. OS on a Mac hasnt changed a great deal since OS X Lion changed the delivery of the OS from optical disks to electronic downloads, using the Mac App Store. The big advantage to downloading the Mac OS is, of course, immediate gratification and not having to pay shipping charges. But the downside is that the installer you download is deleted as soon as you make use of it by installing the Mac operating system. With the installer gone, you lose the opportunity to install the OS on more than one Mac without having to go through the download process again. You also lose out on having an installer that you can use to perform clean installs that completely overwrite your startup drive, or having an emergency bootable installer that includes a few useful utilities that can bail you out of an emergency. To overcome these limitations of the installer for OS X or mac. OS, all you need is a USB drive that contains a bootable copy of the installer. How to Create a Bootable Installer of the Mac OS on a USB Drive. There are two ways to make a bootable copy of the installer one makes use of Terminal, the command line utility included with all copies of OS X and mac. OS the other uses a combination of the Finder, Disk Utility, and Terminal to get the job done. In the past, Ive always shown you the manual method, which uses the Finder, Disk Utility, and Terminal. Although this method involves more steps, its easier for many Mac users because the majority of the process uses familiar tools. This time around, Im going to show you the Terminal app method, which uses a single command that has been included with the Mac OS installer since OS X Mavericks was released. Dont worry if you would rather use the method weve used in the past, Ive included a link to the last time we used the FinderDisk Utility method. Use Disk Utility to Create a Bootable OS X Yosemite Installer. Please note The OS X Yosemite installer is the last version of the installer with which we verified this manual method using the Finder, Disk Utility, and Terminal. The general recommendation is to skip the manual method for any version of the Mac OS that is newer than OS X Mavericks, and instead use the Terminal method and the createinstallmedia command, as outlined below. Start By Not Starting. Before you begin, stop. That may sound a bit daft, but as I mentioned above, if you use the OS X or mac. OS installer, it will likely delete itself from your Mac as part of the installation process. So, if you havent yet used the installer you downloaded, dont. If youve already installed the Mac OS, you can re download the installer following these instructions If youre just now downloading the installer, youll notice that once the download is complete, the installer will start up on its own. You can just quit the installer, the same way youd quit any other Mac app. What You Need. You should already have the OS X or mac. OS installer on your Mac. It will be located in the Applications folder, with one of the following names A USB flash drive. You can use any USB drive that is 8 GB in size or larger. I suggest a flash drive in the 3. GB to 6. 4 GB range, as they seem to be the sweet spot in cost and performance. The actual size of the bootable version of the installer varies, depending on which version of the Mac OS youre installing, but so far, none has gone over 8 GB in size. A Mac that meets the minimum requirements for the OS youre installing If you have everything you need, lets get started, using the createinstallmedia command.