Make a bootable macOS Catalina USB flash drive to install macOS on Apple computer or for Hackintosh purpose. If you don't have a MAC or for other reasons can't access MAC make a Catalina USB using Windows 10.
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This Terminal command, called createinstallmedia, can create a bootable copy of the installer using any drive connected to your Mac. In this guide, we're going to use a USB flash drive, but you could also use a normal hard drive or SSD that's connected to your Mac. The process is the same, regardless of the destination. Whatever media you use to create the bootable Mac OS installer on, it will be completely erased by the createinstallmedia command, so be careful. Whether you're going to use a flash drive, a hard drive, or an SSD, be sure to on the drive before you begin this process. How to Use the Createinstallmedia Terminal Command.
Make sure that the Mac OS installer file is present in your /Applications folder. If it's not there, or you're not sure of its name, seethe previous section of this guide for details on the installer file name, and how to download the needed file. Plug your USB flash drive into your Mac. Check the flash drive's content.
During this process, so if there's any data on the flash drive that you want to save, back it up to another location before proceeding. Change the flash drive's name to FlashInstaller. You can do this by double-clicking the drive's name to select it, and then type in the new name. You can actually use any name you wish, but it must exactly match the name you enter in the createinstallmedia command below.
For this reason, we strongly suggest using a name with no spaces and no special characters. If you use FlashInstaller as the drive's name, you can just copy/paste the command line below instead of typing the rather long command into Terminal. Launch Terminal, located in /Applications/Utilities.
The initial recommendation given to anyone who lost important data and would like to proceed with the data recovery is always to stop using the drive where the data was stored as soon as possible. You can turn your computer off, remove the drive in question from the docking station, do whatever may be required to prevent any further utilization of that drive. Set it aside, calm down and download a bootable data recovery app using any other computer. Disk Drill is by far the most convenient and up-to-date macOS bootable file rescue solution. It'll make your Mac boot from USB in just a few clicks.Starting with Disk Drill 3, anyone can create a bootable Mac OS X drive in a matter of minutes. Make sure you have an extra storage device, which is at least 2GB in size. Connect it to any Mac, run Disk Drill and use the 'Create Boot Drive' option on the main toolbar.Disk Drill let's you run all its data recovery algorithms via a bootable Mac USB drive.
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This ensures the maximum amount of data stays intact during the recovery process, and other background processes or the operating system itself do not overwrite any recoverable pieces of information. Please note: Disk Drill does not provide any option to create bootable CD/DVD drives due to them becoming less popular and accessible in modern computers. To create a bootable Mac drive you need any disk with Mac OS X 10.8.5 or newer (10.9, 10.10, 10.11 El Capitan, 10.12 Sierra, 10.13 High Sierra, and 10.14 Mojave included) either running as your main system, or just being installed on a drive that's connected to your Mac at the moment. Go to 'Create Boot Drive' feature, and choose the drive you would like to copy the OS X system files from to the new drive that we are building. Once the source disk is selected, proceed with choosing the destination to make a USB bootable drive.
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January 2023
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