You are correct with this. CS 2 was never tested with Mac OS 10.9.4, you can post screenshot of the error message so that we can check if there is we can do to help you with this.
My suggestion would be to use creative cloud version on you machine, it should work perfectly fine. you can certainly download the trial version using below mentioned link.
https://creative.adobe.com/products/creative-cloud
Thanks,
Atul Saini