And more options are becoming available to solve this problem! We just launch two new apps for this:
You can try our CiderTV for OS X (get for free in Mac AppStore or at official web page cidertv.com/osx)
This simple app lets you to navigate between Apple TV menus right from your Mac. And in case you lost native remote for your AppleTV, this app can help you to pair without it (see FAQ on site)
One more analougue - Ezzi Keyboard (https://itunes.apple.com/us/app/ezzi-keyboard/id1069314102?mt=12). You can use it as a remote control for your Apple TV (2nd or 3rd generation). And navigate Apple TV menus,rewind and fast-forward favorite movie scenes, browse your iTunes collection, type texts, passwords and logins on your Apple TV from Mac
Any feedback is welcome. Enjoy!