Martin Felker wrote: RHEL Linux is sulpported for WS 9 at least from version 2 to version 6.
Currently according to the Compatibility Guides the latest version of RHEL that is officially supported as a Host OS with VMware Workstation 9.0 is RHEL 6.3 and macvsog is using RHEL 6.4 and why is being told the Host OS isn't officially supported. Not officially supported doesn't mean it will not work although often it may require manual intervention to install and function properly in unsupported scenarios.