Hello! I keep reading pros and cons of an antivirus protection. Do I honestly need it at this point in time? I just received a coupon for 3 different programs. So, it had me wondering if I should just buy it and have it on my machine. I was always under the assumption that Mac's were safe computers, but now I am wondering what I should do. Do you all have antivirus? How would I be able to tell if I had a virus/malware? Thanks much!