You set your Mac or Macbook which disk to start up from when more than one startup disk is connected. This works for USB drives including the NinjaStik For 2018 to 2020 Macs with the Secure Boot T2 Chip, see the 2020 Macbook Pro Boot from USB instructions. A 'startup disk' is a volume or partition of a drive that contains a bootable operating system. Use your USB drive right-click on it and select format disk format this will format the USB drive so that it can be used to store the Mac OS operating system. One thing you need took care of that the USB drive needs in GPT partition in order to work on a Mac computer otherwise it won't boot. The first thing to do before changing the hard disk or before installing the new OS is to prepare a USB stick with MacOS to reinstall the operating system on our Macbook. How to boot a Mac from a USB with the Option (⌥) key? Start the Boot Manager, which allows you to choose other disks or boot volumes if available. Is it better to do this.
If you're still using a Mac OS X the time will come when your computer won't boot, or a problem may arise where you can't take control of the device, and booting from an OS X installation media will be required.
This is why it's recommended that you make a Mac OS X bootable USB when your Mac is in working conditions. However, if you find yourself on a scenario where your device (iMac, MacBook Pro, Air, Mac Pro or Mini) is not responding and you happen to have a Windows 10 device, then you can still be able to make a USB bootable installation media for your Mac OS X to reinstall the operating system using the Recovery Assistant.
These instructions will also work for Windows users who are running Mac OS X on a virtual machine and need to upgrade to the latest version. For instance, to OS X Yosemite.
Requirements
Before you dive into this guide, you'll need a few things:
- A broken Mac computer with Mac OS X.
- 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).
Now that you have all the necessary ingredients, you're ready to make a Mac OS X bootable USB using the DMG file of the operating system with the steps below.
Create Mac OS X bootable USB installation media
Before you can use TransMac, you first need to partition your USB flash drive with a GPT partition, as a normal MBR partition may not work. To do this, you'll need to use the Diskpart command-line utility on Windows 10.
Setting up GPT partition
Use these steps to set up a USB drive with a GPT partition:
Open Start on Windows 10.
Search for Command Prompt, right-click the top result and select the Run as Administrator option.
Type the following command to open Diskpart and press Enter:
Type the following command to determine the USB flash drive and press Enter:
Type the following command to select the storage and press Enter:
Quick tip: Theselect disk 1command as an example, but you have to replace 1 with the number of the flash drive you want to use.Type the following commands to delete everything from the USB thumb drive and press Enter:
Type the following command to convert the drive into a GPT partition and press Enter:
Type the following command to select the new partition and press Enter:
After you complete the steps, the USB flash drive from MBR to GPT format, you can use the steps below to create a bootable USB installation media to install Mac OS X.
Create USB install media
Use these steps to create a bootable media to install Mac OS X:
Download and install a copy of TransMac.
Quick note: TransMac is a paid software, but it has a 15-day trial solution, that give us more than enough time to move the DMG files to the USB drive from Windows. (If you want to support the developer, you can purchase the full version.)Insert the USB drive that you'll use to fix your installation of OS X. (Remember that all the data in the USB will be erased. Make sure you take off any important documents.)
Right-click the TransMac software icon and Run as administrator. (You'll be prompted to Enter Key or Run, because we'll be using it once, click the Run option.)
On the left pane, you'll see all the Windows PC drives listed, right-click the USB drive that you're intending to use to reinstall Apple's OS X and select the Restore with Disk Image How to access screenshots on mac. option.
In the warning dialog box, click the Yes button.
Use the Restore Disk Image to Drive dialog box to browse for the DMG file with the installation files for Mac OS X Yosemite in this case, and click the OK button to create a bootable USB of the operating system.
Now, you'll have to wait a long time. No kidding. It could take one or two hours to complete the process depending on your computer and other variables.
Once your bootable USB installation media is ready, remove it and insert it into your Mac, power it on, holding down the Option key, and select the USB you just created to reinstall Mac OS X.
If you're having issues trying to create a bootable media, you can get a USB flash drive that comes with Mac OSX ready to install.
Fancy testing the latest beta version of Mac? But are afraid to install it?
Like this, there can be several other reasons – troubleshooting Mac or installing a new update due to which you might want to boot Mac from USB. Here's how to install macOS from USB and make macOS bootable USB.
What is a USB
USB or Universal Serial Bus, also known as a flash drive, is a portable storage device. Due to its portability, compatibility, affordability it is most commonly used across the globe to store any type of data.
This small device is used for several other purposes like storing, copying, transferring data and much more. In addition to this one most important thing, USB is used for is Booting Windows and Mac. But why do we need a bootable USB for Mac?
Reasons for Mac Boot from USB:
Booting/Installing macOS from USB gives users full control over macOS. This means if your Mac won't start or is giving you any trouble you can get around to it by creating bootable USB for Mac. In addition to this, other common reasons why installing macOS from USB should be considered are:
- It allows users to install a different version of macOS.
- It gives users a chance to test the beta version before making the final decision.
- Risk-free testing of the Beta version.
- Faster and efficient.
- Can install older versions to run your favorite apps that aren't compatible with the latest macOS.
How to Boot from USB on Mac
Loading Mac from a bootable USB Mac is pretty simple. You just need to know the requirements and follow the steps explained below:
Requirements:
- Intel-based Mac
- USB thumb drive with GUID partition and OSX installer.
- Minimum 12 GB of free space.
Note: Avoid booting earlier version of macOS X than the one your Mac was shipped with.
Now that you know what you need let's get started.
Steps to boot Mac from USB
- Attach USB to Mac machine.
- Restart your Mac if already running or turn on your Mac.
- When your Mac is about to start, press and hold the Option key to access built-in Startup Manager. Once the Startup Manager screen opens, free the Option key. The utility will now search for available drives including bootable.
- Use arrow keys to select the USB drive you want to start Mac from.
- Once done double click the selection. The machine will not start from the select bootable USB drive.
Using these simple steps you can Mac boot from USB. To learn in detail how to create bootable USB and boot Mac from USB read further.
How to Create a Bootable Installer for macOS
Step 1: Download macOS
Click the suitable download link to download macOS:
- macOS Catalina, macOS Mojave, and macOS High Sierra. Selected OS will be downloaded to your Applications folder. In case the installer launches, exit it.
Step 2: Use the Terminal
Attach bootable USB Mac flash drive and open Terminal. You can find it under the Utilities folder of your Application folder.
Alex graffiti mac. Assuming the installer is still in the Application folder and MyVolume is the name of the USB you are using. Type in createinstallmedia and the following commands.
Catalina: *sudo /Applications/Install macOS Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume
Mojave: *
sudo /Applications/Install macOS Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume
Create Bootable Os X Usb On Windows
High Sierra: *
sudo /Applications/Install macOS High Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume
How to Install macOS from USB
To boot Mac from USB you'll need to select it during boot time. For this, you'll need to use the Startup Manager feature. To use it follow the steps below:
Step 1: Restart or power on your Mac. Mac os x hard drive space.
Step 2: Next, press and hold the Option key. This will open the Startup Manager and will list connected volumes and drives that can be used to boot macOS. Name mangler 3 3 3 7.
Step 3: Select the drive on which OS X is installed, you can use arrow keys to make the selection.
Step 4: Double-click to boot your Mac from the selected volume.
How to boot Mac from USB through System Preferences
Alternatively, you can use System Preferences to boot Mac from it. To do so follow the steps below:
Mac Create Bootable Usb From Iso
Step 1: Open System Preferences > Startup Disk. You'll see different various disk icons.
Step 2: Select the volume you'd like to use to start your Mac.
Step 3: Click the Restart button.
Your Mac will now boot using the selected device until you change it or override it from the Startup Manager.
FAQ's
Use these steps to create a bootable media to install Mac OS X:
Download and install a copy of TransMac.
Quick note: TransMac is a paid software, but it has a 15-day trial solution, that give us more than enough time to move the DMG files to the USB drive from Windows. (If you want to support the developer, you can purchase the full version.)Insert the USB drive that you'll use to fix your installation of OS X. (Remember that all the data in the USB will be erased. Make sure you take off any important documents.)
Right-click the TransMac software icon and Run as administrator. (You'll be prompted to Enter Key or Run, because we'll be using it once, click the Run option.)
On the left pane, you'll see all the Windows PC drives listed, right-click the USB drive that you're intending to use to reinstall Apple's OS X and select the Restore with Disk Image How to access screenshots on mac. option.
In the warning dialog box, click the Yes button.
Use the Restore Disk Image to Drive dialog box to browse for the DMG file with the installation files for Mac OS X Yosemite in this case, and click the OK button to create a bootable USB of the operating system.
Now, you'll have to wait a long time. No kidding. It could take one or two hours to complete the process depending on your computer and other variables.
Once your bootable USB installation media is ready, remove it and insert it into your Mac, power it on, holding down the Option key, and select the USB you just created to reinstall Mac OS X.
If you're having issues trying to create a bootable media, you can get a USB flash drive that comes with Mac OSX ready to install.
Fancy testing the latest beta version of Mac? But are afraid to install it?
Like this, there can be several other reasons – troubleshooting Mac or installing a new update due to which you might want to boot Mac from USB. Here's how to install macOS from USB and make macOS bootable USB.
What is a USB
USB or Universal Serial Bus, also known as a flash drive, is a portable storage device. Due to its portability, compatibility, affordability it is most commonly used across the globe to store any type of data.
This small device is used for several other purposes like storing, copying, transferring data and much more. In addition to this one most important thing, USB is used for is Booting Windows and Mac. But why do we need a bootable USB for Mac?
Reasons for Mac Boot from USB:
Booting/Installing macOS from USB gives users full control over macOS. This means if your Mac won't start or is giving you any trouble you can get around to it by creating bootable USB for Mac. In addition to this, other common reasons why installing macOS from USB should be considered are:
- It allows users to install a different version of macOS.
- It gives users a chance to test the beta version before making the final decision.
- Risk-free testing of the Beta version.
- Faster and efficient.
- Can install older versions to run your favorite apps that aren't compatible with the latest macOS.
How to Boot from USB on Mac
Loading Mac from a bootable USB Mac is pretty simple. You just need to know the requirements and follow the steps explained below:
Requirements:
- Intel-based Mac
- USB thumb drive with GUID partition and OSX installer.
- Minimum 12 GB of free space.
Note: Avoid booting earlier version of macOS X than the one your Mac was shipped with.
Now that you know what you need let's get started.
Steps to boot Mac from USB
- Attach USB to Mac machine.
- Restart your Mac if already running or turn on your Mac.
- When your Mac is about to start, press and hold the Option key to access built-in Startup Manager. Once the Startup Manager screen opens, free the Option key. The utility will now search for available drives including bootable.
- Use arrow keys to select the USB drive you want to start Mac from.
- Once done double click the selection. The machine will not start from the select bootable USB drive.
Using these simple steps you can Mac boot from USB. To learn in detail how to create bootable USB and boot Mac from USB read further.
How to Create a Bootable Installer for macOS
Step 1: Download macOS
Click the suitable download link to download macOS:
- macOS Catalina, macOS Mojave, and macOS High Sierra. Selected OS will be downloaded to your Applications folder. In case the installer launches, exit it.
Step 2: Use the Terminal
Attach bootable USB Mac flash drive and open Terminal. You can find it under the Utilities folder of your Application folder.
Alex graffiti mac. Assuming the installer is still in the Application folder and MyVolume is the name of the USB you are using. Type in createinstallmedia and the following commands.
Catalina: *sudo /Applications/Install macOS Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume
Mojave: *
sudo /Applications/Install macOS Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume
Create Bootable Os X Usb On Windows
High Sierra: *
sudo /Applications/Install macOS High Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume
How to Install macOS from USB
To boot Mac from USB you'll need to select it during boot time. For this, you'll need to use the Startup Manager feature. To use it follow the steps below:
Step 1: Restart or power on your Mac. Mac os x hard drive space.
Step 2: Next, press and hold the Option key. This will open the Startup Manager and will list connected volumes and drives that can be used to boot macOS. Name mangler 3 3 3 7.
Step 3: Select the drive on which OS X is installed, you can use arrow keys to make the selection.
Step 4: Double-click to boot your Mac from the selected volume.
How to boot Mac from USB through System Preferences
Alternatively, you can use System Preferences to boot Mac from it. To do so follow the steps below:
Mac Create Bootable Usb From Iso
Step 1: Open System Preferences > Startup Disk. You'll see different various disk icons.
Step 2: Select the volume you'd like to use to start your Mac.
Step 3: Click the Restart button.
Your Mac will now boot using the selected device until you change it or override it from the Startup Manager.
FAQ's
If you run into problems while trying to boot your Mac from USB check this FAQ section:
What to do if Mac doesn't boot from bootable USB drive?
If you face any problem while booting Mac from a USB drive or the drive with a bootable copy of OS X isn't visible in Startup Manager, it might need repair.
To repair it head to Disk Utility to repair disk permission. If this doesn't help you might have to reinstall OS X.
What type of USB can I use to boot Mac from USB?
Roxio toast 17 pro. Intel-based Macs support GUID partition type to boot Mac from USB
Why does my Mac shut down when I connect the USB drive?
If connected USB is damaged MacBook air automatically restarts as it contains a preventive measure that shuts it down when a USB storage device with the issue is connected.
This was all for now. Using this simple guide we hope you were able to load Mac using the bootable drive. This step will come handy when you want to troubleshoot any problem or want to load Mac from an external device.
We hope the steps were simple to follow. Do share your comments and let us know how you found the article. If you need us to cover any specific topic, please do let us know in the comments sections.
We are always listening.
Make A Bootable Usb On Mac
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