Papazulu,
Your Photoshop, and I believe your Adobe Suite, can be exchanged for the Apple versions for basically the cost of shipping. You will have to down load, complete and return a certificate of destruction of the Windows versions.
As long as your versions are the current ones Adobe will replace your Windows versions with the Apple versions.
If you have a version that is no longer current you will have to pay an upgrade fee to the latest edition. They do not replace previous versions.
If you contact Adobe make sure it is sales that you contact, not support.
Not sure where you are located but that is the procedure in North America with my experience being from Canada.
Altogether fairly painless as long as you deal with sales, as I mentioned.