My MacOS Safari browser was "hit" with the fake AV today, most likely by an advertisement on the Hotmail website that executed (using onMouseOver perhaps?)
which automatically redirected to a fake anit-virus warning page at
There was no preliminary Windows-style display which earlier incidents mentioned. The English grammar in the exploit was poor:
Apple security alert wrote:To help protect your computer, Apple Web Security have detected Trojans and ready to remove them.