New to the forums, not new to macs glad to have finally joined here. Anyway my question to all ML users is whether anyone experiences, well I don't know how else to say it, but a slower response time in the newer OS than Snow Leopard. By Slower response time I mean from the UI and the launching of programs. For example when I launch textedit it takes a good 5 to 10 seconds to launch in ML, where as in SL it loads instantly. I am not going to complain about ML on the whole as there are features I want to take advantage of and upgrade however my user experience has been suffering and I have switched back to SL for now. I have a Macbook Polycarbonate 2010, 2.4GHZ C2D 4GB Of Ram 250GB HD I have tested launch times on my girlfriends Macbook Pro 2012 i5 8GB of Ram 500GB HD She has the same slow response times as myself and her MBP came with it pre-installed. I don't get it, I have done upgrades, and tried clean installs yet I can't figure out what is degrading our experience. Has anyone had this happen and resolved it? If so any tips?