Right-click sqldeveloper.exe and select for easy access. For macOS:
Scroll past the current version to locate the link. Find the 21.4.3 release section. download sql developer 21.4.3
Launch SQL Developer from your Applications menu or Launchpad. Right-click sqldeveloper
Click the green in the upper left-hand corner under the "Connections" tab. Enter a Connection Name (e.g., "Production_DB"). Provide your database Username and Password . Input the connection details: download sql developer 21.4.3