Make A Bootable USB/SD Card On Mac OS X, Many of us want to dual boot our PC or make a bootable disk, usb or sd card for performing a fresh installation of OS on our PC. But how to make a bootable usb or sd card. Well on Mac, it can be done via an application such as (my personal favourite) or using Terminal. I prefer the Terminal method. But I would advise beginners to use. This tutorial will focus on Terminal.
Just make sure you follow the steps properly or else the USB or SD Card can be malfunctioned through this method. So write down all the commands meticulously. Steps.
![Make usb drive bootable vista Make usb drive bootable vista](http://www.wdiaz.org/content/images/2017/06/window10_bootable_usb_on_mac.jpg)
A bootable USB flash drive will help you get your Mac back to working condition, by letting you use all of the tools a fully-working Mac has available. In addition to being able to use Disk Utility, the Finder, and Terminal, and have access to the Internet, you can also load some specific emergency tools onto your USB flash drive. Creating a bootable USB drive can allow the user to restart his machine and salvage any important data before reformatting the computer. It is fairly easy to create a bootable USB drive for a Mac.Difficulty:Moderately EasyInstructions Things You'll Need Mac computer running OS X USB.
Connect a USB or SD Card. Open Disk Utility, either through Spotlight or Launchpad or Finder.
Select the USB or SD Card in left sidebar and click on Erase. Now select the format as MS DOS FAT from drop down menu. Give a name to your USB/SD Card.
Naming is optional. Then click on the Erase button below. List of Drives Connected to Mac. Another important thing to note down is the Identifier. This will be required to unmount the drive as well as make it bootable. In my case the identifier is /dev/disk2.
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Also note down the sub identifiers that is the identifiers of partitions. I have only one partition, hence the sub identifier is /dev/disk2s1.
Make sure you have only 1 partition or else you can find yourself in some serious trouble with the USB/SD Card. To unmount the main drive we will type sudo umount disk2 or sudo umount /dev/disk2. Instead of disk2, type your identifier. Now its time to unmount the sub partitions. For this we will type sudo diskutil umount disk2s1 or sudo diskutil umount /dev/disk2s1.
Instead of disk2s1, type your identifier.
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. 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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