I need to access to a Mac running OS X Lion remotely from a Mac running OS X Leopard and Windows.
Is there any software to do that?
First, you have to enable remote management and screen sharing in Mac OS X Lion (It enables some sort of VNC Server).
From my Mac Leopard: Finder > Go to > Connect To Server. Type:
It will prompt you to type the remote Mac OS X login/password and then launch a screen sharing application. From Windows you can use a VNC client.
Set up VNC on mac and this will solve your problem. VNC stands for virtual network computing and provide acess to remote computer. Here is a detailed guide.