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
I have the same problem with MacOS Big Sur, Java 8. Clicking on the icon doesn't work. This command from terminal starts the application. sh /Applications/SQLDeveloper.app/Contents/MacOS/sqldeveloper.sh
This stopped working in MacOS Big Sur 11.2