I am new to the macintosh ecosystem - just got a brand-new iMac and so far, it has been a tremendous experience. However, back when I used an ugly and noisy tower running Windows, I was attacked at least once in a hour - Kaspersky blocked the IP addresses, but the intruders kept coming back. Fearing Mac OS X was still concerned by these, I installed Little Snitch, and I hated it. The lack of having to authorize everything and being assaulted by dialog boxes was the very reason I switched to Mac OS X. Is my computer really impervious to attacks and should I do something about it? Thanks in advance, for helping me and welcoming me into this forum which I hope I will contribute to.