The guest operating system 'rhel7_64Guest' is not supported
If you encountered this kind of message during the RCDevs VM import, then you have to adjust the compatibility mode according to your ESXi, Workstation, Fusion or Player version. Have a look at the VMWare website to have more information about virtual hardware versions supported according to your VMWare version. To change the hardware version on the VM, have a look at the VM settings > Compatibility mode and change the hardware version with one supported by your VMWare software.
Regards