Relux cannot be directly installed on a MAC OS System. 

It is possible to use third party virtualization software (e.g. VMware, VirtualBox, Parallels) that allows you to run Windows on your Mac OS environment, 

which in turn will allow you to install and use Relux Professional on the emulated Windows system.

For more information, please visit:
http://en.wikipedia.org/wiki/Virtual_machine

The most known virtualization programs are:
http://en.wikipedia.org/wiki/VMware_Workstation
http://en.wikipedia.org/wiki/VirtualBox