Doing a mac software update behind a firewall

My guess is that it uses .dmg files.

Do you know what the content-type will be?  As this is what is causing the update to get through.

I think it's more likely to be .pkg files, as there'd be no need to re-encapsulate the updates in a .dmg.

This page at Apple has some troubleshooting tips:

http://docs.info.apple.com/article.html?artnum=106695

If you can see the list of updates but they're just not coming through, you can download them via a web interface at:

http://www.apple.com/support/downloads/

Hope that's of use

Sean

What happens when you run Apple software update?  Does it error out and do nothing?  Or does it show a list of available updates?  

Mark

It shows the list of updates available so it is getting through, but it errors when trying to install them.

Ok.. I have seen this before.  What OS X version are you using?

Mark

And tell me about  your network?  I you updating over wireless or is the Mac plugged in?

Mark

Oh great, i hope we can get this resolved! I'm running OS X v10.4.5

It was plugged into the network. What else would you like to know about the network?

Ok thanks for your help, i did glance at this article a few days ago but couldn't find anything to do with firewalls.  But i will look at it more thoroughly this evening.