Answer by FIREtower · Jan 10, 2012 at 04:31 AM
Meh.. If you purchased a Mac, you obviously switched from Windows for a reason. Why put Windows-specific antivirus on your Mac? Intego is the only AV company focusing solely on Apple security.
Answer by SkinnyBill · Jan 12, 2012 at 03:31 PM
I used to use iAntiVirus but I never felt like it worked and felt like it was just slowing me down. Similarly with Sophos.
However, more recently I downloaded COMODO anti virus for Mac since they now have a free version. It doesn't seem to get in the way and I trust COMODO (I always use it on my Windows computers and it has never let a virus in where McAfee and Norton have).