You cannot have enough information when it comes to Mac computer security. It seems that Phishing attacks are on the increase. Phishing is where the bad guys impersonate a valid website or entity primarily through emails. They can look very convincing. When you act on the phishing email it takes you to some bogus website that puts stuff on your Mac or gets information out of you. This article describes some of the latest phishing attempts. It is worth the read for your own peace of mind.