I hate saying ‘Java …JDK’ as the J stands for Java, but until then I guess that’s how I’ll keep saying it. Download and Install an Oracle Java 8 or 11 JDK ![]() If you don’t like the answers you get back, you’re going to need to install Java. Or you can ask your machine to tell you what the current Java Home is… /usr/libexec/java_home …which asks Java to tell you what version it is. So the first thing I like to see is if my machine already has Java. Either the JDK was removed and replaced with a JRE, or maybe you ended up with Java 9 or 10 on your machine, which won’t work at all with SQL Developer. It usually boils down to SQL Developer not being able to find and use the proper JDK. ![]() This usually happens as folks get new hardware or as updates are applied to their machines…something quits working. I have ran into a few issues getting SQL Developer version X.Y.Z on my Mac Mini, and I’ve seen a few questions online today now that Big Sur is available. Updated Decem– after some reports from folks having issues on Big Sur, I added some additional details around troubleshooting.
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