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@SteveManes I had a similar problem. I'm also sharing these cross posts. I'm running macOS 10.15.7. I saw the "UD Loading" screen and then... nothing, the application quit. I think it was due to an expired certificate or some type of check within the ISY jar launcher, but all of the standard options I tried didn't have any effect (including some more aggressive ones, like removing the Java apps etc.). Finally, here is what worked for me based on some advice in other posts: 1. Run the following commands to clear the old version of Java (use caution, since these are with sudo) sudo rm -fr /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin sudo rm -fr /Library/PreferencePanes/JavaControlPanel.prefPane sudo rm -fr ~/Library/Application\ Support/Oracle/Java 2. Download and install Java 251 from here https://www.oracle.com/java/technologies/javase/javase8u211-later-archive-downloads.html (Not sure if it matters, but I also ran the uninstaller first) 3. Now, use the start.jnlp command. ISY will load properly! (Ignore the out of date Java warning for now) 4. Upgrade Java back to 261. After these steps, everything works for me.

Yes, and @saphotoexpress please xref my related August Pro post:

@saphotoexpress I had similar issues, but solved it a different way. 1. Remove August Lock from the door 2. Move 1ft from ISY 3. Include August Lock (pairing worked great 100% of the time, tested on multiple locks) 4. Reinstall August Lock on door 5. Perform Z-wave heal (if needed) In my case, I had to add a single repeater after that since I was getting unreliable behavior but only on one of the locks.