Hi, I am using Avast (free version) on my iMac. When the Avast scan starts, it progresses rapidly but, after 85 or 90%, the progress bar slows down a lot, and after 90%, it get stuck there and would stay at 91% for a long, long time. The scanning of files continus at a rapid pace, even at 91%. It seems like the application can't evaluate the number of files to scan, and the progress bar is really inaccurate. It is not a disk speed issue because I have solid state storage. It is not because the CPU is too busy because Avast can have all the CPU that it wants. So, what is happening? Thanks.