If you’re desperately trying to get the `Menu` button in an [Android x86](http://www.android-x86.org) installation working under [VirtualBox](http://www.virtualbox.org) on a Mac OS X host – whose keyboard of course doesn’t have this “context” / “menu” key Windows keyboards have on the right – you might find the touch-only-device mode in Android x86 handy:
1. Click on the clock in the status bar to enable / disable this mode altogether
2. A swipe from the left to the right emulates the `Menu` button function
3. A swipe from right to left emulates the `Back` button function
4. Simply clicking on the status bar brings you to the `Home` screen
([Source](http://www.android-x86.org/documents/touch-only-device-howto))