Mac OS X has always respected user privacy by default, and Mac OS X Yosemite should too. Since it doesn't, you can use the code to the left to disable the parts of Mac OS X which are invasive to your privacy.
How to use it
Download and Extract the Script
I assume the default location of the extracted file as Downloads
Open Downloads & run the following command
python ~/Downloads/fix-macosx.py
More Information can be Found Here.