Development tools for Zephyr on STM32Workbench for Zephyr: VS Code extension to set up, build, flash and debug Zephyr applications on STM32.Devicetree manager: browse, edit and visualize Zephyr devicetree, STM32CubeMX-like for Zephyr.
Can you tell me which version of OSX and Eclipse are you using ?
And can you attach a screenshot of the window Help > Installation Details > Installed Software with the installed plugins version.