UIautomatorviewer need Java 1.8.0_231 only !!

When you run UIautomatorviewer on mac It need specific JAVA version 1.8.0_231

Step to revert to a prior version of JAVA

To uninstall Java from a Mac, you will remove one directory and one file, as follows:
1. Click on the Finder icon located in your dock
2. Click on the Utilities folder
3. Double-click on the Terminal icon
4. In the Terminal window Copy and Paste the following command:
sudo rm -fr /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin
5. Press enter. You may be prompted to enter your computer password before continuing.
6. Next, Copy and Paste the command below and press enter:
sudo rm -fr /Library/PreferencePanes/JavaControlPanel.prefpane
Note: Do not attempt to uninstall Java by removing the Java tools from /usr/bin. This directory is part of the system software and any changes will be reset by Apple the next time you perform an update of the OS.

Then download JAVA 1.8.0_231 from below

https://www.oracle.com/java/technologies/javase/javase8u211-later-archive-downloads.html

After that install It.