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So, USB boot creator is undoubtedly a core function in Dr.boot, it's capable of creating bootable USB installation disk from Windows ISO, Linux ISO and Mac dmg file without complex computer skills and commands, just insert your USB drive and Dr.boot will recognize everything automatically. How to Boot Mac from USB Media. After creating a bootable USB drive, the user simply needs to plug the created drive into the open port on the Mac. Here are the steps to boot Mac from the USB flash drive: Power on the system. Press and hold the Option (Alt) key on the keyboard when the computer starts. Boot Mac from USB Option l: Startup Manager. If your Mac won't boot up normally, you can set it to boot from a different drive, such as a USB stick containing macOS installation files in bootable format. The drive will have to contain a version of the OS that is compatible with the Mac. As long as you have the bootable installation USB, you can. 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. If you're asked to insert a USB drive, plug your USB flash drive into your Mac. Boot Camp Assistant will use it to create a bootable USB drive for Windows installation. When Boot Camp Assistant asks you to set the size of the Windows partition, remember the minimum storage-space requirements in the previous section. Set a partition size that.

Boot Camp Assistant User Guide

You can use Boot Camp Assistant to install Windows 10 on your Intel-based Mac.

Install Windows on your Mac

Depending on the model of your Mac, you might need an external USB drive to install Windows (you’re asked for one when you prepare your Mac for Windows if it’s required). Newer Mac models—with OS X 10.11 or later—use the internal drive to temporarily store the items you need to install Windows and don’t require a USB drive. To find out whether you need an external USB drive, see the “Learn more” section in the Apple Support article Install Windows 10 on your Mac with Boot Camp Assistant.

To install Windows on your Mac, do one of the following:

• If your Mac doesn’t require an external USB drive: Follow the instructions in Install Windows on your newer Mac using Boot Camp.

• If your Mac requires an external USB drive: Follow the instructions in Install Windows on your older Mac using Boot Camp.

Set the default operating system

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After installing Windows, you can set the default operating system to either macOS or Windows. The default operating system is the one you want to use when you turn on or restart your Mac.

1. In macOS, choose Apple menu > System Preferences, then click Startup Disk.

2. Click the lock , type an administrator name and password, then click Unlock.

3. Select the startup disk that has the default operating system you want to use.

4. If you want to start up using the default operating system now, click Restart.

The next time you turn on or restart your Mac, it starts up using the default operating system.

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