If you are using macOS High Sierra, and your OS language is not English, you will see disabled menu items in your top level Eclipse menu. This problem will exist on most versions of MyEclipse running in High Sierra.
The workaround for now would be to edit your Info.plist file, and remove the CFBundleLocalizations entry as shown here: https://git.eclipse.org/r/#/c/105553/4/features/org.eclipse.equinox.executable.feature/bin/cocoa/macosx/x86_64/Eclipse.app/Contents/Info.plist
The location of the Info.plist file for MyEclipse 2017 is:
MyEclipse 2017 CI.app/Contents/Info.plist
The upcoming 2017 CI 9 release of MyEclipse will include a fix for this issue, but this modification will need to be manually made for prior versions of MyEclipse.
The Eclipse bug covering this issue can be found here: https://bugs.eclipse.org/bugs/show_bug.cgi?id=520176