First you want to be downloading the Shaiya client from:
(Links from Vafx) ty:)
Click this link to download Wineskin http://sourceforge.net/projects/wineskin/files/Wineskin%20Winery.app.zip/download
Click save file or Open, your preference but make sure you open using an an archive tool such as Archive Utility.
Once opened, you should get an icon like this one:
Double click the icon and this window will open:
Once opened click the update button (Updates all the drivers you may need for Shaiya to run, mine has already been updated so the button is faded out)
You also want to click the "+" button next to "New Engines Avaliable" and download and install WS7Wine1.3.23 Engine (I haven't tried ws7wine1.3.24 yet so if someone wants to try that and confirm if it works or not that would be helpful to know)
Once downloaded you can click cancel which will bring you back to this screen. You then click "Create New Blank Wrapper"
This window should come up, rename to Shaiya or whatever you like and click ok:
This window will pop up:
Click Install, it shouldn't take too long
This window should come up:
Click view wrapper in finder:
Click and drag the wrapper to desktop
Double click the icon, this window should pop-up:
Click Install Windows software and choose the Shaiya client you downloaded in step 1.
The Shaiya install wizard should pop up and its all pretty self explanatory from there:
Once done, this window shows up:
Change from CONFIG to UPDATER:
Once you click ok, you are ready to play. Double click your Shaiya wrapper and the Updater should come up:)
!! Sometimes this error message may come up which closes the program:
All you need to do is restart the program and keep restarting if it persists until all updating is done then it should work normally.
If you have any questions or need help please post or pm:)
Edit: If you have screen resolution issues, try changing the resolution or run in window. Me on a 15-inch Mac Pro runs the game at 1360x768 in window mode. Looks and runs excellent.