Macworld.com – Need to access your home Mac while youâre nowhere near it? If youâve got a Mac laptop with you, a clever combination of Mac OS Xâs built-in Screen Sharing, Dynamic DNS, and strategically configured firewalls can make that happen. But, if you donât want the hassle of dealing with them, or youâre reliant on somebody elseâs Mac orâheavens forbidâa PC, you may need something more like Citrixâs GoToMyPC.