My home workstation is a mid-2011 iMac (3.4GHz Intel Core i7 with 24GB of RAM). I often work abroad and use my iPad on an untrusted (public) network, I use a commercial VPN for security, but I’d prefer to host my own VPN and rely on my iMac to relay web pages to me via it. I know OS X Server 4.1, contains a VPN module. Could I surf the net through it, and would I still be able to use the iMac as a personal workstation? Mark Deacon
Christian Hall says… After installing OS X Server on a Mac, you can continue to run apps as normal. Server is simply used to set up and manage additional services that run in the background, such as the VPN. These take up additional resources, such as CPU cycles, memory and network bandwidth; the Server app includes graphical tools, similar to the one at the bottom of OS X’s Activity Monitor app, that inform you about short- and longterm resource use. However, your iMac’s specifications are easily sufficient to do something as relatively undemanding as routing web traffic to one iPad.