You say that problem may be solved now, but for reference here is how to install VST effects: Effect Menu - Audacity Manual.
Are you sure you installed Audacity properly? See Do NOT run Audacity from the DMG!!!.
Might you have opened another effect, or reopened Equalization, then clicked the red window close button? That will make Audacity 2.1.2 unusable and require you to force quit, but the issue should have been fixed in our source code now so it will be fixed when 2.1.3 is released (that may be a few months yet) .
Gale