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UPDATED 12/2/18: It doesn’t matter whether you’re a macOS Sierra or a Windows 10 user, it’s just a matter of time until your device refuses to boot, which could be for a number of reasons, including file corruption, hardware failure, buggy update, etc. If the unexpected happens with Apple computer, you can use a macOS bootable USB with the installation media to repair it.
This is one of the main reasons why you should always consider making a macOS bootable USB when your device is working properly. However, if it happens that none of your devices (MacBook, MacBook Air, MacBook Pro, iMac, Mac Pro or Mac Mini) are not working when you need them the most, then you can use a Windows PC to rescue your Apple device. You can use a Windows 7/8.1, or a Windows 10 PC to quickly make a USB bootable installation media to reinstall macOS Sierra on your Mac. In this, you’ll learn the steps to make a macOS Sierra bootable USB installation on Windows 10, which you can use to reinstall or upgrade Apple’s OS. Things to know before proceeding Before you dive into this guide, you’ll need a few things:. A broken Mac computer with Mac OS X or (version 10.12 or later). A trial copy of the TransMac software.
By default, your Mac starts up from its built-in hard disk, but a startup disk can be any storage device that contains an operating system compatible with your Mac. For example, if you install macOS or Microsoft Windows on an internal or external drive, your Mac can recognize that drive as a startup disk. 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 tools.
One high quality USB flash drive with 16GB of storage. A copy of Apple’s macOS (DMG file). How to make a macOS bootable USB installation media To create a bootable USB drive with the latest version of macOS, do the following:. 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 want to support the developer, you can purchase the full version.). Connect the USB flash drive you want to use to fix your Mac.
If you have any data on the USB, remember to make a backup, as everything on it will be erased. Right-click TransMac, and select Run as administrator. If you’re using the trial version, wait 15 seconds, and click Run. On the left, right-click the USB flash drive, select Format Disk for Mac. 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, chances are that it’s using a MBR partition, and the USB drive needs a GPT partition to work on a Mac. On the warning message, click Yes to format the drive.
Enter a name for the drive, such as “macOS bootable USB” and click OK. Click Yes to confirm. If the formatting completed successfully, click OK to continue. Right-click the USB flash drive, and select Restore with Disk Image. On the warning message, click Yes to confirm the data on the USB drive will be erased. Click the browse button on the right, locate the.dmg file with the macOS installation files. Click Open.
Click Yes to create the macOS USB bootable media. Once the process completes, you can now insert the USB flash drive on your Mac computer to install, reinstall, or upgrade the operating system to the latest version of macOS, which can be Sierra or later. How to create a GPT partition on a USB flash drive If the USB flash drive is not working using TransMac, it could be still a partition problem. In this case, you want to redo the entire process again, but this time use the following steps to use the Diskpart command-line utility on Windows to create the appropriate GPT partition. Open Command Prompt as an administrator.
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 (e.g., 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 to a GPT partition, you can use the instructions mentioned above to use TransMac to create a bootable media, but this time skip the steps 5 through 9, and continue on step 10.
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Looking to install macOS Mojave on your Mac? While you can always directly install Mojave on your Mac after downloading it from Apple, I will recommend a clean install as it also makes for a good excuse for cleaning all the junk files on your device. If you are someone who frequently troubleshoots Macs for your friends or family, a USB installer is always good to have. For now, Apple has only released the developer beta of macOS Mojave so only advanced users and developers have access to it. Nonetheless, if you are looking to create a macOS Mojave USB installer, follow the steps below. Things to Know Before you jump to the steps below, here are a few things you should know:. Make sure the Mac that you want to install macOS Mojave on is.
Use a fast USB drive with at least 16GB of free storage space. A slow USB drive will slow down the overall process by a considerable margin.
If you need to buy one, my recommendation would be this. Backup everything before you proceed to install Mojave on your MacBook or MacBook Pro. Ensure that the USB drive is already formatted in Mac OS Extended format using Disk Utility. How To Create a Bootable macOS Mojave USB Installer Disk Note: You must have access to a Mac to create a macOS Mojave installer disk. You can use either an external hard disk or a USB pen drive to create an installer disk, though make sure their read/write performance is good otherwise the installation process will take a long time.
Step 1: First, you will have to download the macOS Mojave beta application on your Mac. Apple recently started the public beta of macOS Mojave. You can find the steps on how to enroll in the public beta program and download the public beta on your Mac.
Step 2: Insert the USB drive on your Mac and make sure to format it to Mac OS Extended format using Disk Utility. Make sure to use a relatively easy name for the USB drive as well. I named my USB drive “mac” and you can use the same as it would make the next step easier for you. Step 3: Now open Terminal on your Mac and run the following command: sudo /Applications/Install macOS Mojave Beta.app/Contents/Resources/createinstallmedia –volume /Volumes/mac When you press enter, you will have to enter the administrator password for the process to continue. Make sure to replace “mac” in the above command with the name of your USB drive.
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In case you are getting an error like syntax not found, make sure to verify that the command above has been pasted properly. Also, ensure that you are using the correct volume name. This will start the process of creating a bootable macOS Mojave USB installer disk. It is important to note that the process can take a long time depending on the speed of your USB drive. You might also be prompted to download Xcode during the process.
How to Boot your Mac with the Mojave Installer Disk Now that you have created a macOS Mojave installer disk, you can use it to install Mojave on any compatible Mac. To boot your Mac using the Mojave installer disk, you will first have to switch it off and then press and hold the Option key whilst pressing the power button. Once you see the Startup manager window on the screen, let go of the button. You should see the macOS Mojave USB installer disk. Simply select it and then press enter to boot from it. If you are looking to install the on your existing Mac, you can do so without the need to create a USB installer disk.
However, if you don’t have access to a fast Wi-Fi connection, a USB installer disk makes a lot of sense. If you are facing any issues while creating a bootable macOS Mojave installer, drop a comment and we will help you out.