Q: SD card plugged into Mac is also a problem
This problem also occurs if you have an SD card plugged in. My was even encrypted. Once the SD was removed, the installation proceeded successfully.
Posted on Mar 17, 2016 1:54 AM
by Loner T,Apple recommended
Safari
There should be no external storage (except the BCA-created USB Installer, if used) when installing Windows on a Mac.
Posted on Mar 18, 2016 8:56 AM