I recently received an email with a virus from a pc user. Emails were sent to everyone in her address book. I didnt open the file but did preview it. How can I find out if the (or any) virus is sitting on my computer, ready to infect my pc user friends (trojan horse?) I tried downloading Avast, Clam etc. but none of them work on older OSX versions 10.4.11. I am also using Entourage and Safari browser. I cant upgrade to later os as my software wont work with them. So what im looking for is something to check whether I have the virus and then a protection to keep me from getting others (mostly pc, of course). Any help for us dinosaurs will be gratefully accepted,.I inherited this computer so dont know if it has virus protection software already.
A Windows virus cannot affect OS X, but it can be passed on:
There are many forms of ‘Malware’ that can affect a computer system, of which ‘a virus’ is but one type, ‘trojans’ another. Using the strict definition of a computer virus, no viruses that can attack OS X have so far been detected 'in the wild', i.e. in anything other than laboratory conditions. The same is not true of other forms of malware, such as Trojans. Whilst it is a fairly safe bet that your Mac has NOT been infected by a virus, it may have another security-related problem, but more likely a technical problem unrelated to any malware threat.
You may find this User Tip on Viruses, Trojan Detection and Removal, as well as general Internet Security and Privacy, useful:
The User Tip (which you are welcome to print out and retain for future reference) seeks to offer guidance on the main security threats and how to avoid them.
More useful information can also be found here: