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Re:Apple iMac Pro goes on sale December 14th by matthew-wegner on Tuesday December 12, 2017 @11:01AM (#15906527)
Of course not. macOS has no DRM, but that could change at some point.

Information on changes for updates come quickly, and it's pretty standard practice to clone your boot drive before major updates.

In a worst-case scenario, you just stay on a version of macOS until it makes more sense to use that same hardware for a Windows/whatever OS change.

Re:Apple iMac Pro goes on sale December 14th by Gaelan on Tuesday December 12, 2017 @11:10AM (#15906620)
Not true IIRC. Several OS components are decrypted at runtime by “Don’t Steal Mac OS X.kext”. Not very effective, of course.
Re:Apple iMac Pro goes on sale December 14th by matthew-wegner on Tuesday December 12, 2017 @11:37AM (#15906909)
I'm aware of DSMOS, but as yet it doesn't do any verification of anything before decryption. Also, the actual key used is simply "ourhardworkbythesewordsguardedpleasedontsteal(c)AppleComputerInc". To virtualize OSX/macOS on hypervisors that don't natively support Mac, you have to pass this in yourself.