Transfer Windows Apache Configuration to OS X
You should probably not blindly copy the entire Apache config directory. To start there will be several parts of the configuration that point to various files and folders that will be different.

The Mac stores the Apache config files in /etc/apache2 so I suggest you have a look at the files in there and compare them to your existing Windows files so that you can make the required changes.

Then before you make any changes copy the entire /etc/apache2 directory to somewhere safe so you can always roll back if you fail.