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#READY BOOT USB FOR MAC MAC OS X#
#READY BOOT USB FOR MAC UPGRADE#
#READY BOOT USB FOR MAC WINDOWS 10#
#READY BOOT USB FOR MAC WINDOWS#

Use these steps to set up a USB drive with a GPT partition:

#READY BOOT USB FOR MAC WINDOWS#

To do this, you’ll need to use the Diskpart command-line utility on Windows 10.

#READY BOOT USB FOR MAC MAC OS X#

Create Mac OS X bootable USB installation mediaīefore 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. 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.

One high quality USB flash drive with 16GB of storage.

Requirementsīefore you dive into this guide, you’ll need a few things:

#READY BOOT USB FOR MAC UPGRADE#

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.

#READY BOOT USB FOR MAC WINDOWS 10#

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. This is why it’s recommended that you make a Mac OS X bootable USB when your Mac is in working conditions.

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.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.

If you're using a keyboard made for a PC, such as a keyboard with a Windows logo, try a keyboard made for Mac. Or use your built-in keyboard or a wired keyboard.

If you're using a wireless keyboard, plug it into your Mac, if possible.

Some keyboards have a light that flashes briefly at startup, indicating that the keyboard is recognized and ready for use. You might need to wait a few seconds before pressing the keys, to give your Mac more time to recognize the keyboard as it starts up. Then press and hold the keys as your Mac starts up. Then press the power button to turn on your Mac.

Press and hold all keys in the combination together, not one at a time.

If a key combination doesn't work at startup, one of these solutions might help:

Eject (⏏) or F12 or mouse button or trackpad button: Eject removable media, such as an optical disc. Disabled when using a firmware password.

Command-V: Start up in verbose mode. Disabled when using a firmware password.

T: Start up in target disk mode. Disabled when using a firmware password.

Disabled in macOS Mojave or later, or when using a firmware password.

Command-S: Start up in single-user mode.

To use the default boot image on the server, press and hold Option-N instead. Disabled when using a firmware password.

N: Start up from a NetBoot server, if your Mac supports network startup volumes.

Or use Option-D to start up to this utility over the internet. Disabled when using a firmware password.

D: Start up to the Apple Diagnostics utility.

If your Mac is using a firmware password, it ignores this key combination or starts up from macOS Recovery. Option-Command-P-R: Reset NVRAM or PRAM.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.macOS Recovery installs different versions of macOS, depending on the key combination you use. If your Mac is using a firmware password, you're prompted to enter the password. Or use Option-Command-R or Shift-Option-Command-R to start up from macOS Recovery over the internet. Command (⌘)-R: Start up from the built-in macOS Recovery system.Keep holding until the described behavior occurs. 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.