Is it possible to disable the automatic download of updates when the internet connection is through a 3G dongle, while still downloading them in the background when the connection is via WiFi or eth0? (Without manually changing the preferences twice a day).
I have a not-so-cheap pay-per-MB subscription, and what's even worse, the 3G coverage in my area is lousy, so I prefer to have the whole, however crippled, bandwidth to myself. I don't know if there are any other processes which use an internet connection whenever present (well, NTP, but I suppose that traffic is negligible).
I'm using 10.10 currently.