The easiest way is to download OS X from the App Store. I’ll show you both methods in case one isn’t working for you. There are two ways you can install OS X on to your external hard disk: by reinstalling OS X from the OS X Utilities repair screen or by downloading OS X from the App Store and running the installer. It should only take a minute or two for the drive to be erased and reformatted. Give your drive a name, choose OS X Extended (Journaled) for Format and GUID Partition Map for Scheme. When you click Erase, a dialog will pop up where you can configure some options. Make sure you backup any data before you erase the drive. Under External in the left hand menu, click on your external hard drive and then click on the Erase button. To do this, open Disk Utility and connect the drive to your Mac. The file format has to be Mac OS X Journaled and you have to use the GUID partition map. If you already attempted to install the Creators Update and see the Stop error with the code 0xc000000f, you will need to use Boot Camp Assistant to remove the Windows partition using the steps found here.The first thing you’re going to need to do is format the external hard drive properly. You can find more info here.Īfter Windows 10 is installed, you will be offered the Creators Update as a normal part of the Windows Update process, or you can trigger the update manually by booting into Windows 10, visiting the Windows 10 download siteand choosing “Update Now”. Install Windows 10 using the Windows 10 Anniversary Update ISO media. Under Select Edition, choose the Windows 10 Anniversary Update that matches your edition.

Review the information under Before you begin, and how to create installation media. Note The download site detects what Operating System you are using, and will only give you the correct options to do this if you go to the site from a Mac. To clean install Windows 10 in Boot Camp, first download the Windows 10 Anniversary Update ISO: If you try to do a clean install of the Creators Update, you will get a Stop error with the code 0xc000000f in winload.efi. For a new installation of Windows 10 Creators Update on an Apple Mac using Boot Camp, you must first install the Windows 10 Anniversary Update using the ISO file, and then update to Windows 10 Creators Update.

Clean install mac os on windows