Sorry you didn't get my point so let me try again.
I purchased that software back then. It worked beautifully. Then it didn't. Why do you suppose that was? Maybe because the software developer(s) wrote some code basicly saying: "OK, you bought this but we're not going to let you use it forever even though it could if we didn't add this bit of code. Get over it."
I own a box camera that is over 80 years old that still takes beautifull pictures.
I also own a Mac Pro circa 2007 running Snow Leopard 10.6.8. It too works beautifully but won't run CS3. It does run AE CS4, Final Cut Studio and many other "older software".
Don't know about you but I'm past 70. Imagine how I'd feel if the doctor told me I'm too old for a new heart. "Get over it".
Hope you get my point. All the best.
Remember to put your mask on before leaving home. :}
There's a kink in the space-time continuum with CS4 activation.
Although the CS4 activation servers are officially dead, CS4 can still be activated for use on a fresh install on a computer where CS4 has never previously been installed. I successfully activated CS4 myself a couple of months ago just as a proof of concept.