You can "not lose hope" for as long as you want, but it just won't happen, be realistic.
I've got Windows on a Mac because of work, and as I know gaming companies outside of NA/EU don't give a flying Blade and Soul Gold ! about Macs. Get an OEM version (aimed at PC developers, not the end user, but some stores still sell them to the public) of Windows. They're about half the price, but still 100% authentic Windows, you just don't get to use Microsoft tech support, as you're suppose to use the PC maker's tech support when running OEM versions.
Companies are going to do things based on where they see the money being, as Korea is the one making the decisions, and they clearly don't see the money in anything outside of Windows, and mobile, a Mac version won't happen. Then as I keep saying, as they can't even be bothered to fix the Windows client, they sure as heck won't make a Mac client too, especially when this region is shedding players steady, as this is the only region that people would want a Mac version for.
If you refuse to get Windows, Buy Blade and Soul Gold then you're only other option would be something like Cider, or Wineskin which will apply a wrapper to Windows programs so they should run on a Mac, just not especially well, and some may not work properly at all. Although waiting for NCSoft to make a Mac version is a waste of time, you'll just have to do something yourself.