The release of vSphere 5.5 adds support for FreeBSD 9.2 on ESXi 5.5, with the following support considerations:
- Installation instruction can be found here http://partnerweb.vmware.com/GOSIG/FreeBSD_9x.html
- Vmware-toolbox-cmd fails on FreeBSD 9.2 (32-bit), please refer to KB-2059649
For more information about software support, please check the VMware Compatibility Guide