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 .

  • If you install macOS with the full 250GB, you can use an app like Parallels or VMWare Fusion to run Windows 10 on a virtually drive, which can be partitioned to be 100 GB. This OS can run full screen, and doesn’t require drivers because it is being run in a Virtual Machine. – bret7600 Aug 17 '17 at 15:07
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    Why would you want to do this when USB is inherently slower than SATA? See this post for more info. – Allan Aug 17 '17 at 15:12
  • @Allan t3 ssd drive now on my mac have write 350 mb and read 420 mb so run apps absolutely faster than internal hdd. – hamed hosiny Aug 17 '17 at 16:12
  • @bret7600 this is the end way if someone dose not have any idea! – hamed hosiny Aug 17 '17 at 16:14

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