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Can’t enable FileVault? An errant set of files may be blocking you

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<p>FileVault is a robust full-disk encryption system that Apple released way back with Mac OS X 10.7 Lion. It encrypts all the data on your disk at rest, so when your Mac is fully shut down, its data is unrecoverable without an approved account’s password or a Recovery Key.</p><p>Some readers trying to turn on or disable FileVault have been met with the message:</p>

<p>A recovery key has been set by your company, school or institution.</p>

<p>What perplexes them is that this occurs on a personal Mac, one that has never belonged to a company, school, or institution.</p><p>The answer appears to be that two files can remain from previous installations, sometimes apparently when you make a disk clone and restore it to a new Mac. These files confuse macOS into thinking the system is under management, with the disk encryption controlled by an administrator.</p><p class="jumpTag"><a href="/article/3528850/can-t-enable-filevault-an-errant-set-of-files-may-be-blocking-you.html#jump">To read this article in full, please click here[/url]</p></section></article>

Source: Can’t enable FileVault? An errant set of files may be blocking you (https://www.macworld.com/article/3528850/can-t-enable-filevault-an-errant-set-of-files-may-be-blocking-you.html#tk.rss_all)