This is an extremely dumb question as it is nearly impossible to answer without knowing what is on my computer, but for the life of me, I am stumped. So I figured I'd at least try.
When I try to activate the firewall settings under system prefs, I get the dialog stating that there is another firewall software running on my computer, and to deactivate it before I can work on the internal firewall settings. Issue is, I don't have any other firewall applications running on this computer.
My laptop, which is running nearly every application as the one I am running, is able to access the internal firewall settings. I realize this is nearly impossible to answer as you are not able to view what is actually on my computer, but perhaps someone has come across this and might know what could be causing this.
G4 Dual 867, 2GB RAM,
OS: OSX 10.4.2
The main apps run are Adobe CS2 and AE 6.5, FCP 5 Studio Pro, Corel Painter IX, Sansurfer/Qlogic, RAID and Xsan Admin, as well as stock Tiger apps.
This is an old and annoying problem that likely happened to you when you installed 10.3 over 10.2.
However i think it really should have fixed itself by now with your upgrades to 10.4.
Give this a try:
Open Terminal (/Applications/Utilities/).
Type: sudo pico /Library/Preferences/com.apple.sharing.firewall.plist
Enter your administrator password when prompted, and press Return.
Using the arrow keys, scroll down to these two lines:
(key) allports (/key)
Directly under "(array)", add a new line containing this text:
Press Control-O to save the file, and Return to confirm.
Press Control-X to exit pico.
Restart the computer.