macOS Sierra does NOT support any version of Windows apart from 64-bit Win 10. Not Win 8, 7 or XP.

Existing Bootcamp partitions may be OK, but new ones cannot be created unless you have Win 10 64-bit.
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This is really frustrating and is in conflict with the advice that Apple give on their website.

“Mac models you can use with Windows 8.1
These Mac models support 64-bit versions of Windows 8.1 when installed using Boot Camp. Use About This Mac┬áto see which Mac you have, then check this list to see if it supports Windows 8.1:”

This is pretty disingenuous because “all these models” do not work. It’s the OS, not the model, and that is conflicting information.

I am using a Mid-2012 MacBook Pro and it is in that list. Since 2012 I have upgraded OS when prompted by Apple, and at some point (i.e. Sierra) I have gone past a point of now return.

When Apple say you can use Windows 8.1 in “Yosemite or later” they actually mean “Yosemite or El Cap, but nothing later than that.”

I have had two tasks today – install bootcamp and clone a single partition (out of 4 total) from one drive to another.

It has been nearly impossible using Mac, from even finding a straightforward partition cloning tool, to massive problems with Windows virtuals guests in OS X hosts, to not being able to even use Bootcamp, or see partitions created by Bootcamp on a Mac.

This is a massive fail. Windows and Linux has far more utils, easier to use and is more accessible.

Sierra is a massive fail for any professional users and just provides another reason to use Linux or Windows. With Windows I could have had the partition clones, free, in under ten minutes. See AOMEI for details, it rocks!