Is there a free VMWare Player for Mac?
Already asked at superuser (Credits to the OP). I post the answer here again - slightly modified:

There is no version of VMware Player for OS X. Instead, VMware sells a Mac version of their product called VMware Fusion. You may use it as trial version 30 days for free

If you don't want to purchase VMware Fusion, you can:


Use Boot Camp to some other OS. The OS itself should run fine.
Use Boot Camp and run vmplayer from the other OS. (Untested since I do not have a OS/X host)
Use  VirtualBox. VirtualBox can use virtual hard disks in VMware's VMDK format (like so).