Cleaning up my Mac
My Mac it the product of three Macs merged into one: (1) a G3 I bought secondhand; and when that Mac died, (2) a G4 I bought secondhand, and to which I attached the hard drives(s) from the first Mac; and when that G4 died, (3) another G4 I bought secondhand, and to which I attached all the hard drives accumulated so far. As a result, my current Mac contains the boot drives from the two earlier Macs.
Mac (1)'s drive has lots of OS 9 applications on it; Mac (2)'s drive has one folder for OS 10 apps and a separate folder for OS 9 apps; and the main boot drive of Mac (3) of course contains its own OS 10 apps. [The OS 10 apps on (2) do not complain when I load them; however the OS 9 apps on either hard disk do complain and require me to choose which System Folder I want]
I therefore have multiple copies of the following (often different versions):
Microsoft Office
Acrobat Reader
Quicktime
Netscape Communicator
Internet Explorer
Fetch
Safari
I would like to clean up this situation, but how?
I have been told that (unlike the PC) with its registry and ubiquitous uninstall programs, on the Mac one can usually simply move an app to the trash to get rid of it. I have also been told that this not true for some apps (painful recent experience shows that it is not true for Protools, for example). But I know of no way to know which is which. I would like to keep a number of the above-listed apps. How do I proceed?
After all, each hard drive has its own System Folder and Extensions (and who knows what other stuff in other places, some of which are doubtless required by one or more of the apps on the respective drive...
Thanks in advance for your help!
G4 Power PC, Mac OS X (10.4.11)