func setVmwareCmd(cmd string) string {
	if path, err := exec.LookPath(cmd); err == nil {
		return path
	}
	return filepath.Join("/Applications/VMware Fusion.app/Contents/Library/", cmd)
}
func setVmwareCmd(cmd string) string {
	if path, err := exec.LookPath(cmd); err == nil {
		return path
	}
	return filepath.Join("/Applications/VMware Fusion.app/Contents/Library/", cmd)
}
// detect the vmrun and vmware-vdiskmanager cmds' path if needed