Please do yourself a favour and read this Medium post by Lead Technical Evangelist Ash Ryan Arnwine about the future of the ExtendScript ToolKit.
I’ll keep it short because I urge you to read the original news. No ETA yet, but ESTK is gonna die soon won’t be re-written to comply with Apple’s 32bit applications ban (macOS-next). Nobody in their right mind would have thought it anyway, but we’ve got an official confirmation.
[confetti fall from the sky]
Go download Visual Studio Code and familiarize with it, while waiting for the new Adobe Scripting plugin (Mac/Win compatible) to be released.