Networking not working? Fix it with our tips
QAlthough both my iMac and MacBook Air run El Capitan and share via Wi-Fi, my wife’s Mac mini is still on OS X 10.6.8. We can’t establish a network connection between her mini and either of my Macs. Is that possible? by Alan Derkacs
AIt’s often tricky to share access across such a range of versions of OS X. It may be easier to connect the more recent version to the older one, rather than the other way around. If you can upgrade the mini to run El Capitan too, you should be able to connect either way.
Debugging networks starts by setting all your devices to use fixed IP addresses (such as 192.168.1.1, 192.168.1.2, and so on) on the same subnet. Open Network Utility on each – enter its name in Spotlight to find it – and select its Ping tab. Prove connections between the various Macs are possible by pinging each Mac’s IP address from all your other Macs.
Next, turn on file sharing, ensuring that a useful folder, such as Documents, is being shared. In Finder, choose Go > Connect to Server, and in the dialog that opens enter the IP address of the other Mac. Enter the admin user name and password for the other Mac that you’re trying to connect to, not the one you’re connecting from.
With network connection issues, first prove each device can see all the others by pinging them in Network Utility.