- Plug the bootable installer into a Mac that is connected to the internet and compatible with the version of macOS you're installing. Press and hold the Option (Alt) ⌥ key immediately after turning on or restarting your Mac. Release the Option key when you see a dark screen showing your bootable volumes.
- The simplest way to create a boot USB drive is to download DiskMaker X and use it to create your drive. Generally, the latest version supports only the latest version of macOS; if you want to install something older than macOS High Sierra, check the list of older versions and download one that’s compatible with your chosen operating system.
How To Boot A Usb For Macbook Air
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Creating a bootable drive from an ISO file (disk image) allows you to do a lot of things, including installing an OS and helping you execute system repairs. However, specialized software is required to make sure that the boot information is copied along with the other files and folders in order to make it bootable. If you want to create a bootable USB drive from an ISO file, the following utilities are recommended. These tools each work on Windows, Mac and Linux computers, respectively. Choose the tool based on what platform you intend to create the bootable drive on.
You’ll see the boot options menu appear. Select the connected USB drive. The Mac will boot the Linux system from the connected USB drive. If your Mac just boots to the login screen and you don’t see the boot options menu, reboot your Mac again and hold down the Option key earlier in the boot process. This solution will allow you to boot.
Part 1: How to Create Bootable USB fro ISO (Windows 10/8/7)
Androidphonesoft ISO Burner can help you create a bootable USB drive from an ISO file quickly and without any errors. Trusted by millions of Windows users around the world, this intuitive software is not just for the experts. Even with limited knowledge of ISO files, you can easily turn your USB stick into a bootable drive in minutes.
The software's UI is clean and simple to understand, but don't be fooled by looks. It integrates extremely well with multiple file systems and supports a wide range of Windows versions, going from Windows XP all the way up to Windows 10. The best part is that user input is minimal because the software does all the hard work for you. No wonder it has such a huge fan following.
Step 1: Download the official version of ISO Burner from this website. Double click the .exe file and follow the instructions on the setup wizard to install the software on your Windows PC.
Step 2: As you will see, there are multiple functions to handle ISO disk images. Click on the one to create a boot disk from ISO file. It's the option that says 'Burn'.
Step 3: On the next window, which is a single-page interface, select your ISO source file and the destination drive, which is your USB flash drive. Leave all other default settings as they are if you're unsure, and click on the 'Burn' button. In a few moments, your bootable USB drive will be ready for use.
How To Boot From Usb
The software contains a lot of functionalities to make sure that your ISO file is burned properly to the drive, including ISO burning, creation, editing and extracting. A lot of effort has been taken to put all the heavy work in the background so the user has a lot less work to do.
Part 2: How to Make Bootable USB Flash Drive from ISO (Mac)
Etcher is a great tool to create a bootable drive on computers running Mac OS. There are some initial preparatory steps that you will need to execute before actually creating the boot drive from your ISO file. In this example, we will show you how to create an Ubuntu boot drive on Mac OS.
Step 1 : Install the Etcher software on your Mac computer after downloading it from the official source. You will also need to download a copy of the Ubuntu OS. You can get that here.
Step 2: You now have to prepare the USB stick by erasing whatever is already saved on it. If required, you can copy these files to your Mac computer as a backup. First, go to applications and utilities and click on 'Disk Utility' to launch it. Now insert the USB flash drive into one of your computer's USB ports. Once the device has been automatically detected, set the format as MS-DOS(FAT). The scheme should be set to GUID Partition Map. Finally, click on 'Erase'. While doing this, make sure that your USB flash drive has been selected in Disk Utility, or you may end up erasing another drive by mistake.
Step 3: Since you have already installed Etcher, you can now directly launch the software. If the software is blocked at installation time, go to System Preferences and then Security & Privacy. Here, click on the '‘Open Anyway' button next to the notification message in the bottom half of the window.
Step 4: In the Etcher interface, select the disk image, which is the Ubuntu ISO file that you downloaded earlier, then select the drive, which is your USB flash drive. Finally, click on 'Flash' and then enter the password for your computer to proceed with creating the boot drive.
Your bootable USB drive will soon be ready. You will now be able to use this USB stick to install a new OS on any desktop. The steps for using this software are fairly simple, but you have to be careful to take a backup of your USB data and make sure that you select the appropriate ISO image and the drive while flashing it.
Part 3: How to Make Bootable USB from ISO (Linux & Unix)
UNetbootin will let you create what is called a bootable Live USB drive. Essentially, this is an alternative to burning a boot disk on CD or DVD. It can be used for Ubuntu as well as other distributions of Linux such as Fedora, Gentoo, FreeDOS and several others.
Step 1: Download and install UNetbootin, and launch the application.
Step 2: If you do not have the ISO file for whichever Linux distribution you need, the software can do it for you. Assuming you already have the ISO file that you need, select the radio button against ‘Disk Image'. The dropdown should be set to ISO, and you can select the source file by clicking on the Ellipsis (...) button.
Step 3: Next, select the type of drive, which will be USB drive, and the appropriate drive name from the two dropdown menus at the bottom of the window. Once everything has been set up properly, click on '‘Ok' to initiate the creation of the bootable USB drive. You will be shown the progress in a stepwise manner. Once it is complete, you may remove your USB drive after ejecting it from the Finder window.
Conclusion:
Depending on what operating system your computer is running, you can use one of these fantastic disk image tools to create a bootable USB drive from ISO file. All of them are quite popular with users of the respective platforms..
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These key combinations apply only to Mac computers with an Intel processor.
To use any of these key combinations, press and hold the keys immediately after pressing the power button to turn on your Mac, or after your Mac begins to restart. Keep holding until the described behavior occurs.
- Command (⌘)-R: Start up from the built-in macOS Recovery system. Or use Option-Command-R or Shift-Option-Command-R to start up from macOS Recovery over the Internet. macOS Recovery installs different versions of macOS, depending on the key combination you use while starting up. If your Mac is using a firmware password, you're prompted to enter the password.
- Option (⌥) or Alt: Start up to Startup Manager, which allows you to choose other available startup disks or volumes. If your Mac is using a firmware password, you're prompted to enter the password.
- Option-Command-P-R:Reset NVRAM or PRAM. If your Mac is using a firmware password, it ignores this key combination or starts up from macOS Recovery.
- Shift (⇧): Start up in safe mode. Disabled when using a firmware password.
- D: Start up to the Apple Diagnostics utility. Or use Option-Dto start up to this utility over the Internet. Disabled when using a firmware password.
- N: Start up from a NetBoot server, if your Mac supports network startup volumes. To use the default boot image on the server, hold down Option-N instead. Disabled when using a firmware password.
- Command-S: Start up in single-user mode. Disabled in macOS Mojave or later, or when using a firmware password.
- T: Start up in target disk mode. Disabled when using a firmware password.
- Command-V: Start up in verbose mode. Disabled when using a firmware password.
- Eject (⏏) or F12 or mouse button or trackpad button: Eject removable media, such as an optical disc. Disabled when using a firmware password.
If a key combination doesn't work
If a key combination doesn't work at startup, one of these solutions might help:
- Press and hold all keys in the combination together, not one at a time.
- Shut down your Mac. Then press the power button to turn on your Mac. Then press and hold the keys as your Mac starts up.
- Wait a few seconds before pressing the keys, to give your Mac more time to recognize the keyboard as it starts up. Some keyboards have a light that flashes briefly at startup, indicating that the keyboard is recognized and ready for use.
- If you're using a wireless keyboard, plug it into your Mac, if possible. Or use your built-in keyboard or a wired keyboard. If you're using a keyboard made for a PC, such as a keyboard with a Windows logo, try a keyboard made for Mac.
- If you're using Boot Camp to start up from Microsoft Windows, set Startup Disk preferences to start up from macOS instead. Then shut down or restart and try again.
Remember that some key combinations are disabled when your Mac is using a firmware password.
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Usb Boot Mac Os
- Keyboard shortcuts that you can use after your Mac has started up.