Create a Bootable Win7 USB Stick on OSX
- 4GB+ USB Stick
- Windows 7 ISO from Microsoft downloaded to your OSX-Machine
Preparing the drive
- Open Disk utility
- Find the drive, format it with the following options:
- Choose Master Boot Record (MBR)
- 1 Partition (full size)
- MS DOS FAT
If your Mac is rather new, you can't choose the "Create USB" Option from Bootcamp so you have to hack Bootcamp first.
- Open the "Sytem Information" App and find out the "Boot ROM Version" and your "Model Identifier"
- Open Terminal
sudo cp /Applications/Utilities/Boot\ Camp\ Assistant.app/Contents/Info.plist ~/Desktop/Info.plist.bak
- Edit Info.plist `sudo vi /Applications/Utilities/Boot\ Camp\ Assistant.app/Contents/Info.plist"
DARequiredROMVersionsadd your Boot ROM Version, enclosed in tags, like you see it there.
PreUSBBootSupportedModeladd your Model Identifier in the same manner.
USBBootSupportedModels, removing the "Pre".
- Sign the Boot Camp App again.
- This step does NOT work if you put the backup file inside the .app-Container, or added any other files. This is actually a mistake in most of the tutorials you find out there.
- Install XCode
- Install Xcode-command line tools
sudo codesign -fs - /Applications/Utilities/Boot\ Camp\ Assistant.app/Contents/MacOS/Boot\ Camp\ Assistant
Creating the USB Drive
- Open Boot Camp Assistant
- Select "Create USB Drive", uncheck the other options.
- Select your preformatted drive and the ISO and you're good to go.