For security run ClamXav I have used it since the get go, and never found anything or had a positive. OS X is safe by default, all the same it`s worth running the ClamXav sentry if you are dealing with a mixed environment, think of it as helping our "Windows" brothers & sisters out. What`s passed on to you may not infect your Mac, however it may cause issue for family, friends & colleagues...
ClamXav is very customisable, I limit the "Sentry" on demand scan to a very few specific folders; Downloads, Documents, Dropbox & Desktop, unless there is any change in the files the "Sentry" will not consume any significant resource. Same folders are set up for an automated scan daily in the small hours. My older machine is a MacBook Pro 4.1 (2.4Ghz Penryn) the impact of ClamXav is negligible at best.
If you are going to be receiving mail/data/documents and forwarding on ClamXav offers an elegant solution that costs you nothing. Once I am happy with Lion & the apps my new Air will pickup the workflow and ClamXav will be on board, in the professional environment passing data with a malicious payload does you no favours, be it corporate or freelance
ClamXav is very customisable, I limit the "Sentry" on demand scan to a very few specific folders; Downloads, Documents, Dropbox & Desktop, unless there is any change in the files the "Sentry" will not consume any significant resource. Same folders are set up for an automated scan daily in the small hours. My older machine is a MacBook Pro 4.1 (2.4Ghz Penryn) the impact of ClamXav is negligible at best.
If you are going to be receiving mail/data/documents and forwarding on ClamXav offers an elegant solution that costs you nothing. Once I am happy with Lion & the apps my new Air will pickup the workflow and ClamXav will be on board, in the professional environment passing data with a malicious payload does you no favours, be it corporate or freelance