Vovando Dev

The latest Macbooks lack keys to adjust keyboard brightness and F5 and F6 don’t work as it was previously. To fix that create a new plist file in ~/Library/LaunchAgents 

named com.local.KeyRemapping.plist and added the code below.

<?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>Label</key>
    <string>com.local.KeyRemapping</string>
    <key>ProgramArguments</key>
    <array>
        <string>/usr/bin/hidutil</string>
        <string>property</string>
        <string>--set</string>
        <string>{"UserKeyMapping":[
            {
              "HIDKeyboardModifierMappingSrc": 0xC000000CF,
              "HIDKeyboardModifierMappingDst": 0xFF00000009
            },
            {
              "HIDKeyboardModifierMappingSrc": 0x10000009B,
              "HIDKeyboardModifierMappingDst": 0xFF00000008
            }
        ]}</string>
    </array>
    <key>RunAtLoad</key>
    <true/>
</dict>
</plist>

Save the file and reboot. F5 and F6 will now work as keyboard brightness up/down keys (after you log in for the first time after rebooting).

Also, you can add MacOS Settings -> Control Center -> Keyboard Brightness

Switch on the needed controls 

Now the keyboard brightness can be controlled from the Control Center (top right corner of the Screen)