Just installed MacOS Sierra on one of my machines. I did a clean install by pressing OPTION + COMMAND + R then formatted the drive with the APFS file system, then installed the operating system. During the new owner setup installation I choose to encrypt the disk with FileVault. After the setup was completed, I check on FileVault to see how long takes to encrypt a 250GB SSD disk on a 2015 MacBook Pro. It show that it will take 10 hours to encrypt... is this normal with High Sierra or is a new feature? With macOS Sierra it only takes less than 20 minutes or less to encrypt the disk. Is anybody else having this problem?