Also, if your Mac is experiencing problems, a bootable installer drive makes a handy emergency disk.
Also, if you need to reinstall Lion, recovery mode requires you to download the entire 4GB Lion installer again. Finally, a bootable installer drive makes it easier to install Lion over Leopard assuming you have the license to do so.
When this article was originally published, the Mac App Store version of Lion would not boot any Macs released in mid or later, as those models shipped with a newer version of Lion preinstalled. If your only Mac was released after Lion, so you can't download the Lion installer from the Mac App Store, I've also provided instructions for creating a bootable Lion-install drive for newer Macs.
The next steps depend on whether you want to create a bootable hard drive or flash drive, or a bootable DVD.
How to create a bootable installer for macOS
I recommend a hard drive or flash drive—a DVD will work, but it takes a long time to boot and install. In versions of the Lion installer prior to However, with the You can use Disk Utility's Restore screen to create a bootable flash drive or hard drive. When prompted, insert a blank DVD a single-layer disc should work, although you can use a dual-layer disc instead , choose your burn options, and click Burn. So if you plan to use that installer on other Macs, or to create a bootable disc or drive as explained here, be sure to copy the installer to another drive—or at least move it out of the Applications folder—before you install.
If you don't, you'll have to re-download the entire thing from the Mac App Store. If you've already installed Lion—so it's too late to move the installer—you've may find that the Mac App Store claims that Lion is already installed and prevents you from downloading it again. As I explained in our main Lion-installation article, you should be able to force a re-download using one of the following three tricks: One of these three procedures should get rid of the "Installed" status for Lion and let you download it.
Burn a DMG or ISO File to Disk (Macintosh)
Apple appears to have recently made this process easier: If you previously purchased Lion from the Mac App Store, the button next to Lion in the Store should simply say Download—click it to re-download the installer. Here's our guide to installing Lion, from the best way to get your Mac ready, to undertaking the Run Bootrec commands. Inject Drivers to WIM.
Inject Drivers into Windows installed on Volume. Quit Disk Utility after this operation completes.
Windows Install Media Download the current install media from the Microsoft website. If there is not an AutoUnattend.
Once the Flash drive has been created, it should look like this: Select EFI volume in the startup selector. To set the variable: Disable SIP by booting to the recovery partition.
Burn a DMG or ISO File to Disk (Macintosh) | UMass Amherst Information Technology | UMass Amherst
Boot back to macOS and open Terminal. Run the follow command and enter the admin password when prompted: Launch it admin privileges so that you can exercise all the admin rights.
It may ask you to type the Administrator password. Firstly click the " Burn " option to open main interface and browse the ISO image source file from the source location. After you have chosen all your priorities, click on "Burn" button to burn the ISO image file.
It will take few minutes and your bootable disk will be created with the ISO image burnt onto the disk. Form the article above, you can clearly deduce that iSeePassword ISO Editor for Mac is the only reliable burning image tool with no demerits or limitations at all. Don't miss: However, most of time it's working and your data will be copied.
Open the "Finder" option then "Terminal" app. Now, type "diskutil list" to find out which one is the USB flash drive. Assuming you have downloaded the Windows ISO file and it is stored in the Downloads folder. So, go ahead and mount the.
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ISO by opening it.