Muddiest point

The muddiest point I have for this week relates to the hand-on point as well as some general questions about operating systems. The Google Desktop hand-on point sounds interesting but I feel reluctant to download it. I am uncertain that it will work well on a Mac OS. In the past I encountered some bad experiences downloading programs like that for Windows XP and I see a similar outcome with using it on my computer. It probably is not a big deal, I just have my doubts about it, that's all.