Do you get an error message when it crashes? Can you locate a vmware.log inside the virtual machine's bundle which contains a log of the crash – and/or launch Console.app and find a crash report for vmware-vmx– and attach it to a reply here in this discussion? (Use the "Attach" button in the lower-right when composing a reply... Please don't paste the whole logfile into the body of your reply.)
Thanks,
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Darius