1, mac downloads a pure version of win7 iso and puts it in that directory.
2, partition, can be installed in a part of the mac system disk, with the system's own disk tools, at least 30G, divided into MS-DOS(FAT) format.
3. Prepare a USB flash drive with more than 8G, format it and insert it into the mac.
4. Open the BootCamp assistant, check the first two "Create an installation disk of win7 or later" and "Download the latest software supporting win from Apple", then continue and wait for nothing.
5. After the production is completed, restart the computer, press and hold the option, enter the startup hard disk selection, select the win7 icon of the U disk to start, and then follow the same steps as installing win. Go in and reformat the newly formatted disk into NTFS.
6. Then press and hold option every time you restart, and enter win.
7. After the installation is completed, enter win7 and open the USB flash drive, which contains a win driver. I forget what it's called. Then I went in and installed all the drivers.
8. activate win7
Hope to adopt!