How to make ' and < map to the right keys (force change from ANSI to ISO)?

Question

My separate keyboard (a Das Keyboard 4 Ultimate with ISO layout) has, to my chagrin, a different and erroneous keyboard mapping than the MacBook's built-in (also ISO).

The biggest annoyance is the different mapping of the ' and < keys.

The built in laptop keyboard is like so (Norwegian locale, ISO layout):

While the separate keyboard behaves like so (ANSI layout):

This is not the correct layout. E.g. the Enter/Return button is wrong (1 row). It should be like this (again ISO layout):

Note that the Enter/Return button is 2 rows high here.

Unfortunately, the Mac setup does not fully recognise the keyboard:

… even though it lists it in System preferences, under Modifier keys:

Changing between ISO and ANSI does not help:

Note that the Ultimate keyboard is completely blank:

Finally, on the Keyboard Setup Assistant intro screen, it is stated “Your Logitech device cannot be identified and will not be usable until it is identified” (Emphasis mine). While I have a Logitech mouse, the keyboard is, as described, from another manufacturer. I have never attached a Logitech keyboard to the computer.

I have tried to search for answers here on Stack Exchange. I have found similar topics like this, this and this, but none that answers this issue.

Answer 1

After removing the com.apple.keyboardtype.plist file (found in /Library/Preferences/) and restarting, the Mac stopped referencing the non-existent Logitech keyboard. I could now use the Keyboard Setup Assistant, and finally the ISO layout was respected, solving the problem.

FWIW, this is the binary content of the plist I ended up with:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>keyboardtype</key>
    <dict>
        <key>320-9456-0</key>
        <integer>41</integer>
    </dict>
</dict>
</plist>

Answer 2

If deleting the plist files doesn't work (it didn't to me) I have found in some answer to old similar question that after reseting to default the shortcuts this issue may be fixed:

System Settings -> Keyboard -> Keyboard Shortcuts -> Restore defaults

(And reboot)

Answer 3

Managed to switch from ANSI to ISO by installing karabiner-elements with

brew install --cask karabiner-elements

and then from the karabiner app, go to Virtual Keyboard and select from the dropdown list of Country Code 0 option ISO instead of ANSI.