Bootcamp Installation

The error message indicates some type of storage device is connected.

• Quit the installer
• Check and remove all external storage
• Run SMC and NVRAM Reset
• Boot into macOS, and re-run BC Assistant, and click on Remove/Restore
  • If it fails, post the output of diskutil list from macOS Terminal, else,
  • Quit BCA, re-run BCA, and try to install Windows.

KelvinDuong wrote:

I got everything set up again, thank you!

Excellent!

Could you answer my question to if resetting smc and nvram could fix lag issues in the future? Like unresponsive applications and etc.

A SMC/NVRAM Reset is not intended to resolve all issues. It can address a few issues which are related to software-hardware interaction.

Did the Bootcamp drivers get installed? Without them, you will not be able to see networks. You should be able to skip this and continue.

Click on the error message, and post the detailed error. If it is asking about NTFS or FAT, you need to format the BOOTCAMP partition. If the error message is different, please post a screen shot.

Do you have any external devices connected to your iMac?