The licenses of Endpoint Protection for OS X are different from those for Windows/Linux and Android devices.
Therefore, you can purchase as many trial/release licenses of Endpoint Protection for OS X as you want, regardless of the number and type (trial /release) of licenses of Endpoint Protection for Windows/Linux/Android that you may already have. Obviously, you can also purchase trial/release licenses of Endpoint Protection for OS X only.
Additionally, the protection for OS X computers is configured separately from the options for other operating systems.
Click here for information about the available protections for each operating system.