Hello,

The issue is the same my mac is OSx 10.10 Yosemite which accepts only java se 7 or higher so i downloaded java se 8 and also installed eclipse luna 64 bit coz eclipse kepler and helios i tried to install they need java se6  not se8 so further i tried to install force.com plugin which installed successfully as i can check from about eclipse>installation details> force.com ide v31 is installed but when i check from perspective it doesn't show up.
i tried to re install plugin, restart eclipse and check in perspective still force.com ide not found 
and in the add repository> the location used to fill up automatically in past and now its empty i need to manually enter the url for force.com ide to download from internet into eclipse luna
please help to resolve this issue asap...Appreciate your help!