Great App
Beautiful time lapses. I have it set on the slowest time setting. My desktop looks like the wallpaper is static but over the day the scene slowly changes.
I am running a 2008 iMac and Macbook on mountain lion and it works just fine for me without hogging system resources. CPU usage for me is less than 5% on the slow setting.
The app has been updated more than once a year since I got it. Each update brings spectacular new time lapses.
dhth about
Magic Window, v1.5