Aug 14, 2020 Bootable MacOS installer USB drives provide for the ability to clean install macOS Big Sur, update to macOS Big Sur, install macOS Big Sur beta onto multiple Macs without redownloading the installer, as well as the ability to use Disk Utility to partition and erase a machine, perform Time Machine restorations, and more. Open Disk Utility in the Utilities' folder. After Disk Utility loads select the drive (out-dented entry with the mfg.' S ID and size) from the side list. Click on the Erasetab in the Disk Utility toolbar. Name the drive, 'MyVolume'. Because since El Capitan the disk utility of macOS was different, if you running El Capitan and want to create bootable U SB for macOS Sierra you can use Yosemite Disk utility for El Capitan just google it! This method also works to creating USB installer for El Capitan, Yosemite and Maverick, and the other previous version of Mac OS X as well. The native disk image utility on Mac is ideal for burning a DMG to a USB drive. Once you burn the file to the drive, this drive can be used to install the associated application on any other Mac system. The process may vary slightly depending on which version of Mac OS X your computer is running, but the steps below will give you a fair idea of. After choosing a save location, leave the Image Format as Compressed and click Save to begin ripping the system disk to your hard drive. Disk Utility will create a digital clone of your system disk in the Apple disk image format (DMG) that will then be used to make the USB. Choose where you want to save the disk image and what you want to name it.
If you use pkgutil to expand the InstallMacOSX.pkg it opens to three items, the Distribution file, InstallMacOSX.pkg and Resources. You can alter the Distribution file to ignore the supported platform check, see below.
Creating the Install OS X El Capitan.app on a mac that came with a newer OS than El Capitan.
Download the InstallMacOSX.dmg from Section 4 of How To Upgrade To El Capitan
Double-click to open InstallMacOSX.dmg to Install MacOSX.pkg.
Drag InstallMacOSX.pkg to the Desktop.
Open Terminal, enter the text
A folder will be created on the Desktop after a while with the contents of the .pkg file.
In there you will see an item called Distribution, Control-click on that and select Open With
go to Other and select Text Edit.
When the file opens scroll down to the section that reads,
function isSupportedPlatform(){
type in at the end return true; so it now reads as,
function isSupportedPlatform(){return true;
Now click Save and close the document.
Go back to Terminal and enter the text,
press Return, after several minutes, be patient, (check to see if the prompt has returned to Terminal) a new package will be created on the Desktop.
When created double-click on that and an installation window will open where you will now convert the
new InstallElCapitan.pkg to the Install OS X El Capitan.app which will be placed in your Applications folder.
You can now create a bootable USB using the install app and createinstallmedia,
If you have the time I would be grateful if you could give this a trial, it works here on my mac, but I would like confirmation from yourself or any others reading this that the procedure works on macs that came with macOS Sierra or newer pre-installed. Oh and tell me if my description of the procedure is easy to follow and understand..
Jan 15, 2020 12:58 AM
For those who don't know, DMG files are mountable disk image files for Mac OS, just like ISO files of Windows OS. DMG files are generally found to be compressed and encrypted. Since it is Mac OS compatible, so it is easier to burn it to USB using a Mac platform. In fact, you can do that with in-built utilities. But when you are about to use it on a Windows system, you would need extra help of either offline third-party tools or online tools to do the job.
In this article, we will show you 5 ways to burn DMG files to USB using both Windows and Mac OS platform.
Part 1. Burn DMG to USB on MAC
This method may vary depending on which Mac OS version you are currently running, but the overall concept is same for all. The in-built disk utility on Mac is ideal for burning DMG to USB. Once the DMG is burnt, the USB drive, now bootable can be used as an installer on any other mac System.
Step 1. Navigate to the following pathway: Application>> Utilities>> Disk Utility.
Step 2. Click on the Disk Utility option to run it.
Step 3. Insert your USB drive and check if it appears on the left side of the Disk Utility operating Window. It means the drive is recognized by the system.
Step 4. Now open a Finder Window and browse to locate your DMG file. Drag the file to the Disk Utility Window.
Step 5. Now specifically select the file by clicking on it, and then click on 'Burn' option from the same Window.
A pop-up will appear, select the USB drive as your destination drive and click 'Burn' again to proceed.The process will take some time depending on the MAC os version you are using. Once done, take out the USB for later use.
Part 2. Convert DMG to ISO First then Burn to USB
In this approach, we will perform the task on Windows platform. To do this, we would first convert the DMG to ISO file format, since this is the file format Windows fully support. Then use any free ISO burners to burn ISO file into your USB drive. You can do this task using certain online converter as well. But we would use command prompt (command line interpreter of Windows OS) to do the job.
Step 1. Make sure you have the DMG file ready in your computer.
Step 2. Press 'Windows + R' to get the 'Run' dialogue box. Type 'cmd' and hit 'Enter' to get the black command prompt dialogue box.
Step 3. On the black screen of cmd, type the following syntax and hit 'Enter': dmg2img.exe {source file.dmg} {destination file.iso} .
For instance, dmg2img.exe c:Apple.Mac.OSX.v10.7.Lion.dmg c:mac.iso. The processing will take some time. After that, the DMG will be converted to ISO.
Step 4. Finally, you can use any freeware ISO burners, like PowerISO, ISO editor, Free ISO burner to burn the ISO file to your blank USB drive.
Part 3. Burn DMG to USB on Windows using UUBYTE
UUBYTE DMG Editor is a great tool that can seamlessly write DMG file to USB drive with the booting information and make it bootable. It's a fast and effective way to create a macos bootable installation drive. Apart of the DMG burning option, it also provides 'Extract' option which allows you to extract any files and folders from DMG file to computer. In the aspect of software usability , for those users who are not particularly tech-savvy, WonderISO has eliminated the hassle of performing lengthy and confusing steps. This is a third-party tool which can do the job both on Windows and Mac OS. It can not only burn DMG files to USB, but it can burn various other files formats like ISO, RAW, IMG, ZIP, BZ2, etc. It supports multiple disk image burning at the same time, which is quite unusual. Regular software updates are available from time to time. For your queries, professional team for customer support is available.
Step 1. Download the tool for sure from its official website to get the authentic one. Install it with on screen guidelines. Run it by clicking 'Run as administrator' from the right-click sub menu. On the first screen, you will be presented with two options to choose: Burn and Extract. Click on 'Burn' option.
Step 2. In this screen, Insert your USB to any free USB port and wait till the device is recognized.
Step 4. A new Window will pop-up. Here browse to select your DMG file from the computer directory, mention the USB drive to store the burnt image, and finally click 'Burn' option to start the process. The progress can be seen by a progress bar.
When it is done, take out the USB drive and insert your Mac computer. You can boot your Macbook from this USB drive by clicking the option button during bootup and select this USB drive.
Part 4. Burn DMG to USB on Windows using PowerISO
PowerISO is another third party tool which can burn Mac os DMG to USB drive on Windows 10. It can compress, edit, burn DMG files apart from ISO files. You just have to make certain changes to the tool's default settings to bring about the change. Apart of DMG file, it's also a great tool to process ISO image, CD/DVD burning and other process.Make an image and modify the preferences your ISO is prepared to use.
Bootable Osx Usb Dmg
Step 1. Download the tool from any free software distributing sites to the computer which stores the DMG file.
Step 2. Insert your USB drive to any free USB port. From the tool main interface, click on 'Tools', and then 'Burn' option.
Step 3. When a new operating Windows turns up, set the burning speed to a optimum value that your hardware can handle. Click on 'Burn' once more to initiate the burning process.
Write Dmg To Usb
The third method is recommended if you don't have much experience with command prompts and ISO burners. It is an easier and direct approach. You don't even have to get an additional ISO burner to do the job, since it is in-built. So UUByte DMG Editor appeals to novices or beginners.