I was used to the settings panel in the System Preferences. Too bad it is not there. (It is just a minor detail)
Something is missing in avast, is how many file there is, just to help to know if there is still hours of scan needed of just a few. Of course this doesn't give precise idea of the time needed, but at least after 5 hours, we know if 70% of the files have been scanned or only 10%.
The scan seems to be much more faster. But still, 12 hours for 4'300'000 files (still not the end. I don't know how many files are left). Is it normal (macbook pro 2010, 2.53ghz)