Oracle SQLDeveloper on MacOS won't open after installation of correct Java

Question

I downloaded the Oracle SQLDeveloper, but when I opened it, it said that it requires a minimum of Java 8 and gave me the website for the download. I went on and downloaded Java

Answer 1

The post above is right: SQLDeveloper only runs under Java 8.

This is counter-intuitive as other programs runs under at least X version of a software (not only X version). I kept downloading Java 11 with no luck.

After 1 failed attempt a month ago and two hours of searching today, I found this easy fix worked for me.

Solution

1. Delete the following Java files and folders on your mac.

   • /Library/Internet Plug-Ins/JavaAppletPlugin.plugin
   • /Library/Java/JavaVirtualMachines/(delete current java folder)

2. Download and install Java 8. https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

3. Launch SQLDeveloper.