If you have ISO or CDR, you are good to proceed without any hustle. If you have IMG or DMG, you have to convert to ISO or CDR

On Mac mini server, there is no CD/DVD. The boot camp assistant will create a bootable usb disk for you. But first of all, you MUST have a good ISO or CDR image file.

Tricky thing is: boot camp assistant asks for ISO, but takes CDR as well. So if you can convert to CDR, which is the default for Mavericks with CD/DVD master option, do not bother to convert to ISO at all.

• Put the CD/DVD into the driver
• Open disk utility
• Select the Superdisc from the left panel
• Click convert
• From the popup windows, choose “CD/DVD master” and no encryption nor compression. !This is very important!
• Wait a while till it is done.

The converted file should have cdr as postfix in the file name, if not, just change it to .cdr.

• Open disk utility
• Drag and drop the IMG file to the left panel
• Click convert
• From the popup windows, choose “CD/DVD master” and no encryption nor compression. !This is very important!
• Wait a while till it is done.

If you already have ISO or CDR in hand, no conversion needed.

• Plug a at least 4 GB (recommended 8GB) USB disk to the mac mini
• Start boot camp assistant. There are 3 options, by default all of them are enabled.
  1. First option, is to make the usb disk. You do need it
  2. Second option, is to download automatically the windows drivers and boot camp support file from Apple site. If you use 4GB usb, please disable this one. This step can take longer time, depending on the internet connection.
  3. Third option, is to partition the hard disk, namely “Macintosh HD” or “Macintosh HD2”, depending on 1 or 2 hard disks you have installed into the Mac mini. This step also starts the installation process.

After the hard disk is partitioned, the Mac mini will restart automatically. And the windows installation starts.

1. Some articles say that upgrade version of windows cannot activate if you do a straight install. I haven't had this issue at all. Installed 2 version, 32 bit and 64 bit, both worked.
2. Some articles use dd to convert disks. Please do not use that on Mac. It does not save that much of time, and the chance of ruin the image file is high. It is recommended on Linux though.
3. Remote disc from other Macs won't work! It is stated on Apple website

• Boot camp puts boot from usb *only* on. If the use does not get your Mac properly started, you end up with “no bootable disk” error. Restart the Mac by holding down the power button for 5 seconds and hold the option key after the Apple startup tone, you can select your startup disk from there.
• go to preference → startup disk and choose your startup disk, this make the startup disk permanent.