Earlier in the year the OSX/FruitFly.A Malware bug was spotted on the Mac platform. It went away for a while, but a new variant of this malware has returned. This malware does a bunch of intrusive stuff including recording keystrokes (passwords anyone). Most virus apps will detect it. I am sure the excellent Malwarebytes app will find it as well. Might be a good idea to scan your Mac for this bad boy.