In the past Adobe would do a cross-grade for a nominal fee, I have no idea what their current policy is. They request you sign or agree to destroy and dispose of your current software once you receive the version for the new platform.
The fee covers the cost of new install disks and shipping, around $25 per application. In your case since there is no mac equivalent of the Production Studio this may pose a problem.
Call the toll-free Adobe store for details and have your customer number ready.