Really.... since Opera 19 this feature haven't been changed. For the record - now I'm on Opera 25 already....problem still exists.((( Why like this?

Hi.
I'm Opera user since 1998. Been upgrading with it to all of the new releases. Now I have both Windows 7 & Mac operated computers. With Microsoft system I did not have a trouble in changing search engine in the bar at all. We all know how to do it in Notepad. My region of activity is in Russia. My Mac is connected to US AppStore. How come that I got Yandex search engine on speed dial's search bar if I completly don't need it there. Google is much more powerful& less comercial than Yandex is.
So my request is about changing this service to a proper one. How can I do this, 'cause it makes me think about going to Chrome after 15 years being Opera user. Why you guys (devs) make it so hard to change it in Mac. Make it as customizable button on speed dial page. People need it & you've already been asked before as I see here on forum. The very new Opera 25 version is unveiled and there is nothing of this feature in it too. I've been trying to do it for 45 min. without result. Improve it urgently or teach me how to do it the way I need.

But on Windows some of the devs are posting advices to change the log in textPad to get the initial search engine variously? why we can not do same on Mac. I'm in russian internet spac but I really work often with Google rather than Yandex installed originally on loaded Opera. Why like this/ Is it hard to keep same code to get this feature for future versions of browser.
My locale is Russian-> How I do change from Yandex to Google on speed dial. How about this feature in Opera 19 for Devs?