Magic Keys is not directly compatible with Mac OS. We have many people using it on MacBooks by virtualising Windows with software like Parallels Desktop or Virtual Box, VMware, Bootcamp. To use wine or crossover you need to configure somehow the USB port to be binded to the simulator which is something we have been unable to achieve.
You can use the following videos to install it using virtual box:
Magic keys (videos on the download page on our website)