Hello @Castar30 I take it that you have not purchased any cards under the new mac account?
If you have you need to contact a member of the team to look into this for you.
But if the answer is no, then it is simple. Make sure you have your login details for Castar30 account. These can be found on the website if you do not know them.
Now open up the mac version that has the new details and go to advanced settings and right click Synchronize with server and select Register Again option and enter your v numbrr and password and wait for it to finish setting up.
If you have any difficulties let me know and I will try and help.
Good luck.