Sorry for bumping an old thread. But I just wanted to reply so that other users who may experience problems and search for answers can find them.
I discovered that the LG software does not like two of these monitors attached at the same time while attempting to update to the latest firmware. If you're running two of these: You have to disconnect one, ensuring only one is connected to your Mac. If you don't, your monitors will sit there without ever receiving an update. This is kind of annoying especially since the there is no alert to the user. I was wondering WTF was going on.
- Close the LG Screen monitor app
- Ensure only one LG Ultrafine is connected to your Mac
- Open the LG Screen monitor app. You should get a popup alerting you of the firmware update. if you don't, visit the monitor update section and wait a minute until it fetches the info from your monitor and compares them to LG's update server.
- Repeat as necessary for each and every LG monitor you have.
Hope this helps someone else.
Extremely frustrating seeing this post on several sites now. Having the software, trying to update and wondering WTF was going on. The worst thing possible you can do is ASSuME the end user understands the flow you intended for them when writing your software WITHOUT NOTIFYING THEM OF YOUR REQUIREMENTS! FFS LG!