I bought Divine Divinity for the Mac version as I already own the game on PC. I was hoping get from Gog a wrapper well setup.

Alas if the game launch fine, I have when I play the game about top half of the screen that flicker. I have seen that already with few wrappers with some other games, and once found a trick but no way I can remember which one.

Any idea of what I could do?

My system requirement is fine, but it's an old Mac and I cannot upgrade the OS to 10.8.x so I'm using the last version of 10.7.

My graphics card is a Radeon HD 5770, 4Gb RAM, Double dual processor at 3Ghz, this is a Mac Pro Rev 1.1 quite an old beast but still a monster. :-)

Any suggestion?

OMG playing randomly with the wineskin settings I found a setup working perfectly on my Mac.

In case a newbie read this, to access wineskin wrapper (generally not advised with Gog versions as Gog already did all the work), select the installed application of divine divinity and then right click and select Show the package content. Inside there is the Wineskin application, just launch it. Click Advanced and select the Options tab. There there are some options relative to video. At bottom a button "Set Screen Options" with more options relative to video.

Second warning, check in my previous post, my setup fits the requirements but isn't a common one, so what is working for me could not work for you.

The last change I did right before have it work was in Options tab:
- unselect "Force use of wrappers quartz-wm for window decorations and not what is on the system". Quote it means it worked better for me to use some stuff in my system than stuff inside the wrapper setup by Gog. It's a solution very dependent of your computer configuration.
- In that option tab only one option is checked: "Map User Mac OS X folders in wrapper".

But before that I also played with setup you get by clicking the button Set Screen Options.
so for mention here what I put, I don't know if it helps or not:
- Fullscreen selected, resolution 1280*1024, color depth 24, Switch pause 0s.
- Installer option: Use these setting (Note: Certainly pointless and just for the installer that you won't use).
- Override Wine control of Screen Settings? => Override selected.
- Extra Gamma Correction: none
- Other Options: All unchecked.

And finally the last trick, probably just because of some setup, perhaps the Kensington trackball I'm using, To launch the application, double click and NOT MOVE at all the mouse/trackball until the application have finished to launch and you get the start menu.

That last trick is one I knew because it was a trick I had to do with another game (Gog doesn't provide the Mac Wrapper). But without some or all of the setup above that trick was doing nothing.

Once more it's not suggested to do all this stuff unless you are really blocked. And there's very few chance that was is working for my computer setup will work for your.

EDIT:
I tried go back on settings of "Set Screen Options" as it worked only when I changed an option in Options tab. But for my computer setup they are really required to not have the flickering, the only setup more simple working is to use:
Resolution : Current resolution.

It changes nothing in both cases the game at launch will change the resolution, it just avoid wonder which resolution choose in that setup. :-)