Unable to start the Genymotion virtual device

不知是MacOs还是VirtualBox的更新问题，Genymotion在机器重启之后就不能用了。提示：Unable to connect to your virtual device! Genymotion will now stop. Check your VirtualBox network configuration.

很明显是ViutualBox的网络设置问题，所以调整Genymotion里面的设置没用。需要打开VirtualBox, go to menu File/Preferences menu, go to Network section, select Host-only Networks tab...不知为何我这里的Server address被改成了192.168.56.101，在我改回100之后，重启Genymotion就没问题了。

IPv4 address/netmask: 192.168.56.1/255.255.255.0 (on Adapter tab)
DHCP server enabled checked (on DHCP server tab)
Server address/netmask: 192.168.56.100/255.255.255.0
Server lower/upper address: 192.168.56.100/192.168.56.254