Choose these two, if you have installed MACOSX10.10.3 system, only need to buy WIN8.1, if you want to spare MACOSX system, you can choose win8.1+osx10.10.3 Dual system
Hello, after you receive our U disk, please insert WIN8 system u Disk
Click the leftmost icon at the bottom of the screen: FINDER, go to folder,
Select: Application
Selection: Utilities
Double-click the Bootcamp assistant inside
After the point continues, the following image will appear, but the default is 3 tick is selected, please cancel off the above two tick, leaving only a third tick, as shown below:
Then point to continue, the following image appears, the left side is the size of the partition representing the Apple, the right is the size of the partition representing the WIN8, the point between the two drag around, you can adjust the size of both partitions. After adjusting, click Next in the lower right corner, the progress bar appears, the partition is being partitioned, and the partition automatically restarts into the WIN8 installation.
Click the last partition of the image below, the partition name is: bootcamp, size is just reserved for the size of WIN8, and then click on the format below it, will be prompted to say that the data will not be saved, direct point to determine, and then it will be formatted.
Point below: OK, then next
Set the computer name below, just fill in your favorite name
Direct point: Use quick settings and set yourself up for trouble.
Then set your own user name and password (user name can not be the same as the computer name you just set)
Set it to the next diagram: