When choosing to install Windows 7 using the Boot Camp Assistant, after files have been copied from the Windows ISO to a USB Flash drive, upon rebooting I've noticed that the Windows installer prompts the user to choose an edition that they would like to be installed – even if the source Windows ISO is of a specific edition (Home Premium, Ultimate, etc). How is this possible – does Boot Camp Assistant simply remove the "ei.cfg" file from the USB drive or similar?
Windows – How does the Boot Camp Assistant force the Windows installer to prompt the user to choose an edition of Windows to install
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Best Answer
The latest Windows 7 with SP1 ISO can be downloaded from the Microsoft website Download Windows 7 Disc Images (ISO Files). After entering the product key for
Microsoft Windows 7 Professional Upgrade 32/64-bit (English)
, I was eventually lead to the page shown below. I downloaded the 64 bit Windows 7 ISO.After mounting the ISO, I was able to determine that a
ei.cfg
file does exist in thesources
directory. The contents is shown below. The default is to install Windows 7 Professional.According to Install Windows 7 on your Mac using Boot Camp, the Boot Camp Support Software includes an answer file named
AutoUnattend.xml
. The Microsoft document Windows Setup Edition Configuration and Product ID Files (EI.cfg and PID.txt) states the following.Using the
Dism
command, provided by the latest Windows 10, produces the following list of images stored in thesources\intall.wim
file on the Windows 7 ISO. Windows 7 Professional is the image with index of 3.