Is there anyway to install macOS Sierra and Windows 10 on external SSD drive?
I bought a new T3 250GB Samsung external USB 3 drive.
I want to install macOS on 100GB partition and Windows 10 on other 100GB partition for max speed on all OSes .
Bootcamp only offers internal HDD drive of my iMac and Windows 10 can't install on the USB drive without formatting the whole disk and which I will lose all partitions like the macOS partition .