macOS Mojave upgrade: FileVault?

From

http://osxdaily.com/2013/11/25/check-filevault-status-command-line-mac-os-x/

I learned that one can determine the FileVault status remotely with:

sudo fdesetup status

It turns out that my machine is not under FileVault!

So the popup message is misleading.

The solution seems to be to go ahead and get a graphic

card and then put FileVault on the machine.

Thanks WordWeaver777, that's interesting!

My fault for not being clear.

You found the page

https://support.apple.com/en-us/HT208898

When I tried to upgrade I was given this message in a popup:

> Installing macOS Mojave on this Mac requires that all graphics cards

> have Metal support and that FileVault is disabled. Visit

> https://support.apple.com/kb/HT208898 to learn more about the

> installation requirements for this Mac.

That url forwards to the url you gave.

There you will see the instructions to turn off FileVault.

But it says nothing about whether one can turn FileVault

on again after the installation for my particular machine.

So that's the question. Afte installing, can I turn FileVault

on again?

===

Reading more closely (DUH!) I see that the page says:

> Turn off FileVault, then install macOS Mojave

>

> Many third-party graphics cards won't show anything on the display

> when macOS Mojave is starting up, including the Apple logo and

> startup progress bar. As a result, you can't log in to a system that

> uses FileVault, choose a different startup disk before your Mac

> boots into macOS, or perform some hardware diagnostics

This seems to imply that these problems would happen AFTER

installation, making the machine impossible to use. But it's not

clear. I'll try contacting the Apple Support link they provide,

https://getsupport.apple.com/

Thanks. What machine are you on? When I started the upgrade I explicitly was told to turn off FileVault.

Did that happen to you?