It does not matter whether you use macOS or Windows 10. It’s just a matter of time until your device will refuse to start, which could happen for many reasons, including (and not limited to) file corruption, hardware failure, and buggy update. If the unexpected happens with an Apple computer, you can use a macOS bootable USB with the installation media to repair it.
Mar 06, 2018 The EFI partition will not be mounted as you can see in Windows Exporer, but you wont have permission to access or edit it just yet. Access & Edit EFI partition on Windows. In order to open the EFI partition on Windows and be able to make changes to it’s contents we are going to use a third party program called Explorer. Create Bootable USB for Mac on Windows 10, Mac and Windows file system is completely different, so you are not able to create bootable USB for Mac with PowerShell, CMD or Rufus.If you remembered, till MacOS sierra the Apple file system was Hackintosh, but MacOS 10.13 High Sierra has the technology of Apple Filesystem. That’s why we can’t create bootable USB with Windows.
This is one of the main reasons you should consider making a macOS bootable USB when your device is working properly. However, if none of your devices (MacBook, MacBook Air, MacBook Pro, iMac, Mac Pro, or Mac Mini) aren’t working when you need them the most, then you can use a PC to rescue your Apple device. You can use a Windows 10, Windows 8.1, or Windows 7 device to quickly create a USB bootable installation media to reinstall macOS Catalina or Big Sur on your Mac.
In this guide, you’ll learn the steps to create a macOS Catalina bootable USB installation on Windows 10, which you can use to reinstall or upgrade the Apple OS.
Requirements
Before proceeding, you’ll need the following:
- Broken Mac computer running macOS (version 10.12, 11, or later).
- A trial copy of the TransMac software.
- One high-quality USB flash drive with 16GB of storage.
- Copy of macOS (DMG file).
Create macOS bootable USB installation media
To create a bootable USB drive with macOS, use these steps:
- Download and install TransMac on the Windows 10 device.Quick note: This is a paid software, but it gives you a 15-day trial, which is more than enough time. (If this works for you and you want to support the developer, you can purchase the full version.)
- Connect the USB flash drive. (If you have any data on the flash drive, remember to make a backup, as everything on it will be erased.)
- Right-click the TransMac app and select the Run as administrator option.
- Click the Run button. (If you’re using the trial version, wait 15 seconds.)
- Right-click the USB flash drive, select the Format Disk for Mac option from the left navigation pane.Quick note: You want to do this before creating the bootable media because there is a good chance that the drive was formatted using a Windows device. If this is the case, the chances are that it’s using an MBR partition, and the USB drive needs a GPT partition to work on a Mac.
- Click the Yes button to format the drive on the warning message.
- Confirm a name for the drive. For example, “macOS bootable USB.”
- Click the OK button.
- Click the Yes button.
- Click the OK button.
- Right-click the USB flash drive and select the Restore with Disk Image option from the left navigation pane.
- Click the Yes button to confirm the erase of the USB flash drive data.
- Click the browse button on the right.
- Select the .dmg file with the macOS installation files.
- Click the Open button.
- Click the OK button.
- Click the Yes button.
Once you complete the steps, you can now insert the USB flash drive on your Mac computer to install, reinstall, or upgrade the operating system to the latest macOS version, which can be Sierra, Catalina, Big Sur, or higher.
Create a GPT partition on USB flash drive
If the USB flash drive is not working with TransMac, it could still be a partition problem. In this case, you may need to redo the entire process again. However, this time you should use the following steps to use the Diskpart command-line utility on Windows 10 to create the appropriate GPT partition, and then follow the above instructions.
To create a GPT partition on a removable drive, use these steps:
- Open Start.
- Search for Command Prompt, right-click the top result, and select the Run as an administrator option.
- Type the
diskpart
command and press Enter. - Enter the
list disk
command to view all drives connected to your computer and press Enter. - Type the
select disk
command followed the number assigned for the USB flash drive (for example,select disk 4
), and press Enter. - Enter the
clean
command and press Enter. - Type the
convert GPT
command and press Enter. - Enter the
create partition primary
command and press Enter to complete the process.
Once you formatted the USB flash drive with a GPT partition, you can use the instructions mentioned above to use TransMac to create a bootable media, but this time skip steps No. 5 through 10 and continue on step 11.
After the process completes, which can take up to an hour, connect the USB flash drive and power on your Mac holding down the Option key, select the USB drive to begin installing macOS.
If you have problems creating the bootable media, you can get a USB flash drive that comes with macOS Sierra, El Capitan, Catalina, etc., on it with the link mentioned below. (I haven’t tried it personally, but it’s worth the try if nothing works.)
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 UltraDMG
UltraDMG 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.
Step 1. Download the tool from any free software distributing sites to the computer which stores the DMG file.
Access Usb On Mac
Step 2. Insert your USB drive to any free USB port. From the tool main interface, click on 'Tools', and then 'Burn' option.
Mac Usb Wireless
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.
Open Mac Usb Drive On Windows
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.
Jul. 31 2019 15:54 pm / Posted by Vicky Tiffany to Windows