How To Install Mac Os X Lion From Usb Credit: Lifewire This program should be installed prior to using a bootable USB drive to install macOS. CleanMyMacX takes care of all redundant files and system clutter on your Mac by scanning it in one scan. Backup Pro compress your backups, enable automatic backups, and recover from an external drive for any computer. With Setapp, you can backup, recover data, and perform disk cloning and other tasks using the Disk Drill tool. In this guide, I’ll show you how to create a bootable USB drive on your Mac using the Disk Drill and Terminal. When it comes to bootable drives, USB thumb drives and external hard drives are interchangeable. In addition, the drive can be used to install a new version of macOS on up to six different Macs at the same time. Life can be saved by having a bootable USB drive in the event of an emergency. As soon as your Mac displays the Startup Manager, select your external drive as the startup disk by clicking on it. You can select from a list of options that appear on the Mac if it is an M1. While the computer is booting up, hold down the Option/Alt key. You can either format, restore from backups, or reinstall Lion from this location. Any Mac that runs Lion can now boot to the USB drive. I prefer a USB flash drive to a bootable DVD for this method, similar to how to install Lion. With this step, you can create a USB drive that can be used to install the new Mac OS X Lion. Right-click on the Install OS X Lion application and select Show Package Contents. Open the Applications folder, which is located in the Finder.ġ4. Double-click on the InstallESD.dmg file on the desktop. You should see a file called InstallESD.dmg. Another window will appear with the contents of the InstallESD disk image. Double-click on the InstallESD.dmg file.ġ0. ![]() A new window will appear with the contents of the installation file. To do this, double-click on the installation file, which should have a. Mount the Mac OS X Lion installation file. ![]() When the erase process is complete, close the Disk Utility window.Ĩ. Select Mac OS Extended (Journaled) from the Format drop-down menu.ħ. Select your USB flash drive from the list of drives that appears on the left side of the Disk Utility window.ĥ. Launch the Disk Utility application, which is located in the Utilities folder.ģ. Connect your USB flash drive to your Mac.Ģ. Once you have everything you need, follow these steps to create your bootable Mac OS X Lion USB drive:ġ. Here’s what you’ll need to create a bootable Mac OS X Lion USB drive:Ī USB flash drive that is at least 8GB in sizeĪ copy of the Mac OS X Lion installation file This will allow you to install Lion on any Mac that supports the use of bootable USB drives. If you’re interested in running Lion on your Mac, you can do so by creating a bootable USB flash drive. ![]() Inside it is a Contents folder, then a SharedSupport folder, then the InstallESD.Apple’s latest operating system, Mac OS X Lion, was released on July 20, 2011. Control-click (right-click) it, select Show Package Contents, and you'll see a Finder window for it. It should be in the Applications folder on the Mac you downloaded it to, and named Install MAC OS X MountainLion or Install MAC OS X Lion. Via the Finder, locate the installer you downloaded from the Mac Apple Store. See #3 in Formatting, Partitioning, Verifying, and Repairing Disks if you need partitioning instructions. If you're going to copy to a partition, it should be about 5 GB in size. You'll need a Finder window and the Disk Utility app (in your Applications/Utilities folder) on your screen. This procedure has worked in testing, but is not officially supported by Apple.ĭepending on how you install Lion or Mountain Lion, you may need to do this after downloading, but before installing, as the downloaded package may be deleted from your Applications folder during the installation. You may be able to make an Install DVD or partition on a hard drive (including a USB thumb drive).
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