Howdy,
Here is a fairly simple way you can restore you system and restore you applications functionality again, if you don't have a recent clone or good Time Machine backup that you can restore from.
- You first start by reinstalling your OS X 10.6.x, this will preserve all your user data, your applications, no worries there.
- Then install the Mac OS X 10.6.8 Update Combo v1.1 (links provided below)
- Make sure you're printers are showing up correctly in your system preferences, if not, re-add the printers
- Then finally, run the Apple Software Update (by pulling down the Apple Menu), and install any and all remaining updates, except do not then re-install the Security Update 2012-001. It is possible that you may have to reboot after installing some of the updates, and you may even need to run it a 2nd time to make sure that you've got all updates, except NOT the Security Update 2012-001.
Links for 10.6.8 Update Combo v1.1:
http://support.apple.com/kb/DL1399
or the link to directly download this 1.09GB combo updater:
http://support.apple.com/downloads/DL1399/en_US/MacOSXUpdCombo10.6.8.dmg
Cheers,
Daniel Feldman
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