A macOS USB installer saves much time when you want to install the OS offline on two or more Macs. Also, it helps in recovering a system after a startup failure. It is easy to make a macOS USB disk from the full installer downloaded from the App store; Apple provides clear-cut instructions for the same. However, people use this feature only when they have a problem with their computer, mainly when their system is not booting up. In this post, we explore the ways to make a bootable macOS USB for Catalina 10.15 and others from Windows PC and Mac.
Make macOS Catalina 10.15 USB installer on Windows PC
Oct 07, 2012 How to Create a Bootable Windows Install DVD on a Mac. Right-click the Windows image and select Burn. Select Burn again when the option window drops down. Right-click the Windows image and select Burn. Note: The disc will only be bootable if the image is set up that way. Not all images translate to a bootable DVD, so check to make sure you have the right type of image file first. Dec 13, 2010 Remember, an ISO file is typically an exact image of a CD or DVD so if the CD or DVD that was used to create the ISO was bootable then chances are that the ISO file contains this information too. If you would really like to learn more about ISO files you can view this comprehensive Wikipedia page. How to make a bootable DVD or CD. Making a rescue boot disk using Acronis Disk Director 12 a simple process. In the main window, click Tools and open the Acronis Bootable Media Builder: On the welcome screen, click Next: Next, select Windows PE for the bootable media type, and Windows-like representation for the drive:; To create WinPE boot media, your machine must have the Windows.
TimeMachine is the safest option to recover a broken Mac in the offline mode. If a backup is not there, you have to go for a clean installation either from a bootable USB/DVD drive or the Internet. In my case, I lost the boot partition of my iMac and didn’t have a TimeMachine backup. Internet recovery was showing up, but it kept on failing to download the OS files from the servers. As it is my only Mac, I had no option left, until I found the method to use a Windows PC to create a Mac OS bootable USB installer. I did this for making a macOS High Sierra USB drive, and later I was successful in reinstating my iMac. As of now, the OS is Mojave, but the process given below is compatible with all editions of macOS including the upcoming macOS Catalina 10.15.
Step 1: Download macOS Catalina [DMG] for Windows
Download handy print for mac. As said in the beginning, a Mac is must for creating bootable macOS USB disk. If you think about doing it from Windows, the options are limited. The cross-compatibility of extensions for the two OS are entirely different. Luckily some Windows applications support a bootable macOS disk format, DMG. Hence, If we can download macOS DMG file, then it possible build the USB installer from Windows environment.
Most of the sites talking about the bootable macOS USB installer on Windows is not guiding on how to download the required DMG files for the method. Check our page to download macOS Catalina installer installer in DMG format for Catalina, Mojave and High Sierra.
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Step 2: Partition USB disk on Windows to make it bootable on Mac
Here we are creating a UBS installer for Mac on Windows. So make sure that we keep the partition of the USB disk to have an appropriate scheme. Converting the USB disk to have a GUID partition table (GTP) is recommended for this method work effectively.
Connect the USB disk to Windows and run the above-given commands in the correct order. It cleans and converts the USB disk to GUID partition table if it is using MBR or something else.
Step 3: Make bootable macOS Catalina USB installer on Windows 10
When the Internet recovery is stuck and fails to download the OS files, you could use Windows to make a bootable macOS USB installer. Out of the two or three software for handling macOS installer [dmg] in Windows, Transmac is the best one. Transmac is not free, but the developers offer a 15-day trial period, and that is sufficient for one-time use. Now let’s move on to the steps to create macOS Catalina USB disk on Windows.
- I already have the macOS Catalina 10.15 dmg file on my Windows desktop.
- Install the Transmac 12.4 trial for Windows; download here.
- Right-click on Transmac icon, and select to run it with Admin privileges.
- As shown in the screenshot, right-click on your USB disk and pick the option Restore with Disk Image.
- Point the Windows Explorer to the location where you have the bootable macOS DMG file.
- Wait until the software completes restoring the USB disk with Install macOS Catalina app.
- The disk is ready when you see the message “Restore Complete”.
- If you click on the just-made USB installer on Transmac, you could see the macOS Catalina 10.15 files present in the drive.
- Now safely remove the USB and connect it it the Mac you would like to recover.
Here we focus on preparing macOS Catalina 10.5 USB installer on Windows. But this method is same and applicable for Mojave, High Sierra and all previous versions up-to OS X Lion.
How to boot to macOS Catalina from USB Installer made on Windows
Check the image below for macOS Catalina USB installer showing up in the boot options. In this way you could recover and restore a Mac without Internet. Some models of Macs show a prohibitory symbol when you boot from macOS Catalina recovery USB made on Windows. In that case, you need to Install Mojave or High Sierra first and then upgrade to Catalina 10.15 using the in-built software updater. Box sync for mac.
While restarting, Press the Option key on your Magic keyboard or MacBook see the boot choices. However, if you use a Windows keyboard for Mac, press the Alt key. When you see the boot menu, click on Install macOS Catalina (10.15), and proceed to the recovery process.
Alternative: Make a bootable Catalina USB installer on macOS
The recovery partition in a Mac helps in restoring it from TimeMachine or the Internet when there is a system failure. It keeps the essential apps like Disk Utility, which aids in re-installing a fresh copy of macOS. However, this partition gets deleted when you change your Macs hard disk to SSD or like. A bootable macOS USB installer comes helpful in such situations. It is also useful when you want to install macOS on a couple of offline systems without wasting bandwidth and time.
You need a macOS DMG files for making a USB recovery disk in Windows but that not the case when you have a Mac. The only thing is that you have a copy of the Install macOS app, the offline installer downloaded from the App Store. Check out the most reliable ways to macOS USB recovery disk for Catalina, Mojave and High Sierra.
Method 1: Using Terminal to make macOS Catalina USB disk
- Maintain a copy of macOS Catalina full installer in the Applications folder.
- Use Disk Utility to erase the target USB to have macOS Extended format and GUID partition scheme.
- Now, copy the command for macOS Catalina 10.15 from Apple website, here and paste it to the Terminal app.
- In the code lines, there is a string “WINYTIPS.” Change it with the name of your USB.
- Open the Terminal app in Mac and copy-paste the edited code.
- Press the ENTER key and provide Admin password.
- Wait for a minute for the system to copy macOS Catalina installer and boot files to the USB.
Method 2: Using a third-party app to make booatble macOS USB disk.
If you are not familiar in dealing with the Terminal app and command-line interface, consider a freeware macOS app to create the bootable macOS installer. Among the many applications out there, we prefer Diskmaker as it supports Catalina, Mojave, High Sierra, and all other macOS builds after Lion. https://hoffster.weebly.com/blog/jingle-bells-ringtone-download-for-android.
The latest version DiskMaker 9 compatible with macOS Catalina 10.15.
Also, you may consider an alternative, macOS Catalina Patcher by Collin, here. The best thing about the patcher app is that it can make bootable MacOS ISO, and USB disk by downloading Catalina from the Internet, which DiskMaker do not support.
Download and create macOS Catalina USB bootable disk
- Download the latest version of the app from dosdude’s portal and mount the dmg file on your Mac.
- Click continue until you see the window shown in the screenshot.
- Here you may select an existing copy or macOS Catalina or download one from the Internet.
- Click on “Browse for a Copy” If you already have macOS 10.15 in your Applications folder.
Now, select the installation method as “Create a Bootable Installer,” and then pick the target USB disk in the next screen. Your macOS USB installer will be ready in a few minutes.
Formatting USB Drive on MacInsert the USB drive on your Mac and follow the below instructions to format. Usb format for mac and windows. On your PC.2. Press “Command + Spacebar” to open Spotlight Search box and type “disk utility”.
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To create a bootable USB drive from a DMG file on Windows, you will need to have the right utility. That's because DMG is not native on Windows. It is the Mac equivalent of an ISO file that has been in use since Apple transitioned from the IMG format with Mac OS X. A DMG file, like ISO, can be used to install macOS operating system or Mac apps. If the Mac computer was broken or crashed and couln't get into the system, but you only have access to a Windows PC, there's still a way to make a bootable macOS install USB on Windows.
This article looks at three applications that you can use to create a bootable USB drive from a DMG file in Windows. All of them have their advantages and disadvantages, which we have highlighted. You can make the best choice for you based on the information provided below. They are in no particular order of preference.
How To Make A Bootable Mac Os X Dvd On Windows
TransMac - Make DMG File Bootable USB on Windows
This is a fairly robust application for creating bootable USB on Windows from a DMG file. However, there's a preparatory step to be executed before you can create the bootable USB drive. The typical disk partition used is MBR, but you will need to do a partition with GPT for this to work. You can do so by executing the diskpart command in Windows CMD. Alternatively, you can do it from within TransMac, as shown in the instructions shown below the next paragraph.
Once this is done, you can download TransMac and use the two-week free trial period to get the job done free of cost. You can always upgrade if you like the utility and want to keep using it after the trial period has ended. Once you download and install the application, insert your formatted USB drive and follow the instructions below:
Step 1: If you haven't formatted the USB, right-click on your USB drive in the left panel and select Format Disk for Mac from the contextual menu.
Step 2: Right-click again on the drive in the left panel and this time select Restore with Disk Image.
Step 3 : Select the DMG file and click on Open. Once the process is complete, you can eject the drive and use it on a Mac. To boot from this media, hold down the Option key and fire up your Mac.
Convert DMG to ISO and Create macOS Boot USB from Windows
Since ISO is a better format for Windows, you can also convert the DMG to the ISO format and then use the ISO disk image to create the bootable USB. Please note that you can't boot your Mac from bootable USB made from an ISO file, which means you'll have to convert it back to DMG prior to that. Still, it's an effective way to create bootable media for a Mac computer. Here's how it works:
Step 1: Once you have the macOS install DMG file on a Windows PC, click on Windows + R to open the run dialog box, and type in CMD, then hit Enter. When the Command Prompt opens up, use the following command to convert the file to ISO:
hdiutil convert /path/sourceimagefile.dmg -format UDTO -o /path/targetmage.iso
hdiutil convert /path/sourceimagefile.dmg -format UDTO -o /path/targetmage.iso
Microsoft Bootable Usb Windows 7
Step 2: Download and install UUByte ISO Editor on your PC, insert the USB drive and launch the application.
Step 3: Click Burn button on the main screen and point to the converted ISO file. The drive will be automatically detected and click on Burn icon to burn the ISO to the USB drive.
Once the ISO is burned to the file, you can insert it into a Mac and convert it back into the DMG format. Since you're converting the file twice, there's a chance that the file could get corrupted in the process. If that happens repeatedly, then try this next method.
PowerISO: Make Bootable Mac Install USB on Windows 10/8/7
This Windows utility allows you do create bootable USB from DMG on a PC. You can also edit the DMG or extract the contents, and there's also an option to copy it to a disk. For this particular exercise, we'll show you how to use PowerISO to create a bootable USB drive on Windows without having to convert the disk image into another format like ISO.
Step 1 Whatsup gold 2017 download. : Download and install the application on your PC.
Step 2: Insert your USB drive and launch PowerISO.
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Step 3: In the Tools menu, select 'Create Bootable USB Drive… '. You will need to give admin privileges to the software. Alternatively, you can run the program as admin when you launch it.
Step 4: Select the USB drive in the section called Destination USB Drive.
Step 5: Leave all other default as they are and click on 'Start' to burn DMG to the USB drive.
You should be able to see the progress, and a new popup will appear when the bootable media is ready. You can now eject the media and use it to run the DMG on a Mac computer.
Conclusion:
All of these methods are workable, so select the right one for you based on your level of knowledge and your preference.