FWIW, I also have a Mac with JDK8 and the correct version of Eclipse (Mars 2), but have been getting the same errors since before the last release. I have given up on Eclipse and now just use VS Code and the SuiteCloud CLI Node package. I kind of miss having Eclipse for uploading individual script files quickly, but honestly that was about the only thing it did well. It is pretty terrible as a JavaScript IDE, so I wouldn’t spend much time on it.