I've been wondering lately if the amount of memory OS X uses on my Powerbook is normal. For example, right now I'm only running Camino with one tab and iTunes (not playing anything) and my memory usage (in Activity Monitor) is: Free: 68.03 MB Inactive: 538.77 MB VM Size: 5.15 GB I have 1 GB of RAM, by the way. I just restarted a little while ago and I had a lot of Free RAM, but then I opened a big program, the Free RAM went down, and even when I closed that program, the Free RAM didn't come back. So now even though I only have these two programs running, a big chunk of the RAM is in Inactive instead of Free. Also, is it normal for my virtual memory to be that big? Finally, why is it that under my hard drive icon on the desktop it says a certain amount of space is free, but then when I double click on it, at the bottom of the finder window it says a larget amount? Thanks!