In Windows I use CSIDL_APPDATA folder to store the application data for the current user and C_CSIDL_COMMON_APPDATA for all users application data (shared data).
In Mac OS I would use:
~/Library/Application Support/YourApp = Application data for the current user
/Library/Application Support/YourApp = Application data for all users
("~" = home directory of the user)
How can I get the above Mac OS folders using FireMonkey?