If you're currently running macOS Mojave, click this link to find the Mojave installer in the App Store. In fact, it can even work out cheaper than burning a CD or DVD that you just throw away once the version is outdated.Step 1 How to create a bootable USB drive. To install the OS of your choice, USB sticks provide you the easiest possibility. More and more PCs (and servers) are delivered by default without a CD/DVD drive. Dmg image you can find inside the Lion installer (named Install Mac OS X Lion.Booting from a USB stick is nowadays more and more important.It runs on Windows, Linux, and Mac OS X.OS X El Capitan Create bootable USB drive with Mac Disk Utility. You to create bootable Live USB drives for Ubuntu, Fedora, and other Linux distributions without burning a CD. In this post I’ll assume you have already downloaded the bootable ISO image for the OS of your choice, but how to get the ISO image onto the USB stick?. For most Linux distributions the ISO for burning a CD/DVD is available freely on the internet.
![]() Make A Bootable Usb Mac OS X Lion3.The ISO file you have downloaded contains an image of the entire media. Open Disk Utility by following Applications Utilities Disk Utility. Connect the USB to your MacBook. To install macOS on an external hard drive: 1. Windows based computer for macConvert the ISO to UDRW formatMac OS X provides all the tools needed to convert the ISO image to UDRW. Plug in the bootable USB into your Mac Use the Startup Manager or.Some of the steps to create a bootable USB stick could be done in the GUI as well, but as some of them can’t and you have to go to the shell anyway, I decided to do all of the steps in the shell. We first need to convert the image from an ISO to a UDRW (Read/Write Universal Disk Image Format) which we can copy to the USB stick.It installs an app named Install OS X El Capitan into your Applications folder. This image format is sadly not directly usable to copy onto the USB stick. ![]() ![]() Copy the image to the USB stickNow we can copy the disk image we created to the USB stick. If you check it again with “diskutil list” you will see the changes already, also the USB stick will no longer be shown in the Finder. For the following steps we will need the name of the disk which in this case is “/dev/disk2”.With the following command the data on the disk (your USB stick) will be deleted! $ diskutil partitionDisk /dev/disk2 1 "Free Space" "unused" "100%"With this command the USB stick was re-partitioned to have 1 partition without formatting and 100% of the size of the stick. We are now going to remove this partition in the next step. After this is done, the bootable USB stick is ready to be used. $ diskutil eject /dev/disk2To eject the USB stick, use the above command. This command will copy the image to the disk (substitute the appropriate disk name for your USB stick here, as with the re-partitioning command): $ dd if=destination_file.img.dmg of=/dev/disk2 bs=1mThe dd command does not show any output before it has finished the copy process, so be patient and wait for it to complete.
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