Transfer License from PC to Mac

Question

Hi,
I'm just in the process to switch from Windows to MacOS. I tried my old licenses from Photoshop CS3 on the Mac, but it doesn't work (other like Lightroom which works fine on MacOS).
What can I do...I would like to give back the PC license and get a MacOS license. But as I do not want to use it on both machines, I didn't like the idea to buy a second copy.
Although could I run an MacOS Updateversion with a previous Windows license?
Thanks...Carsten

Answer 1

I just bought a Win -> Mac crossgrade for Photoshop by phone;
it took just about 5 minutes and was an easy transaction with
a pleasant service guy.
Steps:   
          go to www.adobe.com
               click on "contact"
               on next page, click "other phone numbers"
               call number listied for "licensing, registration web services"
               told the agent I wanted to crossgrade from CS2 on PC to
                    CS5 on Mac  
               verified name, address, e-mail address
               he (evidently) checked licensing/registration
               he offered full Mac retail package at upgrade price
                    (plus shipping and sales tax)
               I gave him credit card info
               within five minutes, I had confirmation e-mail including
                    all the order conf data in a nice oficial-looking PDF
                    complete with Adobe letterhead
(and while I'm waiting for the package to arrive, I can make use
of the 30-day trial CS5 for Mac ... )
Now this is for a cross-grade which means I'm not going to continue
to use CS2 on the PC and apparently they found all my registration
data with no trouble, but all in all it was about as easy as these
things get.
I don't recall ever using Adobe customer service before, but if this
is anything like typical, it's a lot better than its reputation.