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• Nov 03, 2017  For offline installation you can create a bootable USB to install Sierra. Download Full High Sierra Installer to Create Bootable USB. For offline installation you can create a bootable USB to install Sierra. The above link will give you a file named macOS High Sierra Patcher.dmg. Simply open this file and you will see a new window.
• Jan 16, 2019  Hello, I had a dmg file of a bootable usb installer of macOS Mojave beta with clover, it seems to be corrupt now since when I boot to it clover starts up normally but I don't see an option to boot into macOS only to Windows 10 (which I have installed multiple times on multiple drives on my.

Posted February 28, 2011 by Jimmy S in Apple Mac, Mac OS X Leopard, Mac system administration

Jul 20, 2011  To create a bootable hard drive or flash drive. In Disk Utility, select InstallESD.dmg in the sidebar, and then click the Open button in the toolbar. This mounts the disk image’s volume in the.

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This recipe will explain how to make a USB Thumb Drive bootable with the OS X Lion Developer Preview installer on it and in turn allow you to install Lion on a Mac without an optical drive (ie Macbook Air line). We will need a copy of the installer dmg (not provided) and a 4GB USB Thumbdrive or Memorycard Reader w/memory card and a Mac to convert the dmg to a bootable usb thumb drive.

Requirements:

• – OS X Lion installation DMG (hint: file named: mac_os_x_10_7_11a390.dmg)
• – Mac running OS X Leopard or Snow Leopard
• – USB Thumbdrive or Memorycard Reader w/memory card (4GB mininum, data will be destroyed).

This guide lets you restore the .dmg installer file for OS X Lion onto a usb thumbdrive. We can then boot the USB Drive on our Mac to install OS X Lion from it. This is very handy for us Macbook Air users that do not have an external optical drive.

Guide:

How To Make Bootable Usb With Dmg File On Mac

1. On your Mac, open up Disk Utility. Click on the USB Drive on the left.

2. On the right pane, go to the Restore tab.

3. Click on the Browse button and locate the .dmg installer for OS X Lion. (ie mac_os_x_10_7_11a390.dmg)

4. Once you have it chosen, click and drag your USB Thumbdrive from the left pane to the Destination box. (ie THUMBDRIVE in the screenshot) and then click Restore

I recommend erasing the destination, so be sure to backup any data on the thumbdrive prior to this step! This will take a few minutes to do. Once its finished, you now have a bootable OS X Lion install thumbdrive (basically just like what the Macbook Air ships with).

5. Hold Option/Alt after your see the Apple logo appear and boot with the thumbdrive in your Mac.

Choose the USB Drive to install OS X Lion from your USB Thumbdrive!

• – I would recommend creating a separate partition for your OS X Lion installation as well.

NOTES:

– I have confirmed this working on a Macbook Air 11″, 2010, 1.6Ghz version.

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