There is no Mac OS version of Paratext. There are a variety of ways to create a virtual machine running Windows or Linux, so Paratext for Windows or for Linux can be installed in that machine. Please note that a virtual machine is treated just like any physical machine, in that you will need to purchase a Windows license from Microsoft in order to activate Windows on it.
- There is a free program called VirtualBox (http://www.virtualbox.org) that can create virtual machines.
- The commercial programs Parallels and VMWare Fusion also permit creating virtual machines. They are not free but may provide better integration with the MacOS and Windows.
- The Apple Bootcamp utility enables you to configure your Mac to boot either into Mac OS or Windows. You could possibly install Linux instead of Windows as your second OS but this probably requires some research and technical skill. This solution would not permit you to run Paratext and Mac programs at the same time like you could with a virtual machine.
If you have difficulties with setting up a virtual machine, look for the support options or information on the virtual machine tool you are using. Chances are your issue is a general virtual machine issue rather than an issue specific to Paratext. If needed, you can submit an issue about running Paratext in a virtual machine to the Paratext support site (registration required).