After doing a clean install of Mavericks and getting back all the data from a time machine transfer. I can update all the software fine for example imovie and iworks and all the apps, I did that at my school. But then I find when I am at home I can still update all the apps but when it comes to system update like mail or firmware, it comes up as Didn't get a response from the Software Update sever (10.60.8.40). I figure out that my mac is trying to contact the school sever but can't at home. But then when I am at school the school's sever don't offer the newest update which is faustrating, I like to keep up to date as soon as possible.
Before I upgrade to mavericks, I had mountain lion. Everything runs fine, it uses the school sever and the public sever when I am at home to update, it worked seemlessly, but now it keep trying to contact to school but not the public one. How can I reset the setting and set it to the public sever. I try delting the file com.apple.SoftwareUpdate.plist like some website I search up said. But that didn't change anything.