I have a lot of contacts on my Google Account and I want to have them on a Mac.
Is it possible to synchronize them with an apple already existing account? The apple account haven't the same mail of the Google Account.
You can add your Google account to your Mac, and enable the option to sync your contacts. To learn more about adding your Google account, take a look here.
From an iPhone, follow these steps to set up contact syncing with Google Contacts:
Enter the following information in the fields:
Server: google.com User Name: Enter your full Google email address Password: Your Google account password
Select Next at the top of the screen to complete the setup.
Note: Make sure that SSL is enabled (under Advanced settings), and that the port is 443.