Nope. Put CS5 back on the old Mac and use it as a legacy machine.
:[ Dang...thanks Dave...
Here's why I say what I say:
You can't BUY Adobe software any more. You have to rent it on the creative cloud. By going with the Legacy Machine concept, you'll be able to mull over going to creative cloud, you can evaluate whether Adobe's claims that the new software is as good as the marketing weasels say it is (I personally say "no")....
....and you'll be able to figure whether or not your budget can withstand this new rental way of doing things. That's probably the biggest deal.
I haven't been following the Adobe creative cloud business because I've had it on my old machine for so long....I just looked into it and those prices and all of it is really unreasonable...Paying for the cloud usage...maybe...but having to pay just to use to program is outrageous... Its all very upsetting.
Thank you for filling me in. I will take your advice and see what I can do for this project of mine.