Hidden downloading?

I have a MAC desktop running OS X 10.6.2. How can I check whether my computer is downloading something from the internet without my knowledge?
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tyronenoelConnect With a Mentor Commented:
Check you automatic updates click the apple icon -> check for updates, the click the "software updates" menu item in the top left and click preferences, it will bring up the preferences window and it will show you whether the system is downloading updates automatically, if not get surplus meter


this will monitor your connections
there are several tools to check active network connections. You can use iStat menus which could draw a nice graph into menu bar of your mac, or Little Snitch to get full control of all incoming and outgoing connections. Also, if Terminal and UNIX are not your enemies, you can check command netstat.
There is a nice tool named iftop and a huge software package ntop. Both of them must be installed separately, but ntop if I'm not mistaken has a prebuild package on its web site.
Emm.. never experience before having hidden download except when using Mac OS Updater.

You can try to monitor any connection currently taken place between your Mac and other party using Netstat. It shows connection status, but not showing you any download activities. Active connection for long time usually means some downloading happen or active protocol like FTP is connecting to outside world. http://www.macosxtips.co.uk/index_files/how-to-use-network-utility.php
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