How to Test Windows 10 on Your Mac for Free
If you’re curious about Microsoft’s upcoming Windows 10, Peter Cohen of iMore details how to install the Windows 10 Technical Preview on your Mac for free using the VirtualBox virtualization software. Cohen doesn’t recommend installing Windows 10 under Boot Camp yet, since it’s not officially supported.
I presume the free license key will expire some time after Windows 10 ships.
Yes, most likely, which is all the more reason to keep it contained in an easily deletable VM.