After this process has finished, the machine will restart. Windows will now begin installing itself on your machine.

Once the drive has finished being formatted, click Next.

Formatting one of the other partitions on the drive could wipe out your existing OS X installation. Make sure to only format the BOOTCAMP partition.

With the BOOTCAMP partition still selected, click Format.

You should see a warning stating 'Windows cannot be installed to.' With that partition selected, click Drive options (advanced).

Agree to the license terms by checking the box, then click Next.

Select the language you wish to use with Windows and click Next.

After preparing your Mac with the Boot Camp Assistant your machine will reboot and begin the first Windows installation.

Once this process has finished, you can not change this step. You can adjust the size of the partition by sliding the small dot between the two partitions to the left. Boot Camp assigns a minimum of 20 GB for the Windows partition however, you may want to increase the size of the Windows partition if you plan to store any large media files or install any significant software products (Adobe, Autodesk, etc.) in Windows. You will now be prompted to create a partition for Windows. You will need to restart the computer in this step so ensure that all your work is saved.

At this point you may need to authorize the Boot Camp Assistant to finish the preparations, do this by entering in the username and password for your computer.Confirm that the selected drive is the one you would like to use and that it is OK to erase the the current files by clicking Continue.You will also need to plug in a flash drive or insert a disk for the Windows installation to occur, all existing data on the flash drive or disk will be erased, then select the flash drive or disk that you would like to use. Click Choose and then navigate to where your windows installation file (.iso file) is on your computer.Ensure that all three options are selected, then click Continue.Open the Boot Camp Assistant, located in the Utilities folder and then click Continue.

If your computer restarts after installing an update, run Software Update again to install any additional updates. Click the Apple icon in the upper-left corner and select Software Update.Log in to an administrator account on your computer, quit all open applications, and log out any other users on your computer.The process is comprised of three stages: Mac Boot Camp Linux Installer

Install linux on mac bootcamp