Hi, I am new to mac os. I just download Xcode and after it was installed, there is an entry called "Install Xcode" in the launch pad. However, there is a Developer group in the launch pad also. I am guessing is that the "Install Xcode" is the file that Mac downloaded it down before installation. Can i delete it??? One more thing. I download skype, double click on it thinking that it will install skype, but no. Nothing installed, it acted as if the file .dmg is a disk image, it mounted that file. When i clicked on the mounted drive named skype, inside it, there is a skype icon, an arrow and an application folder icon (the arrow point from the skype icon to the application folder icon). If i just click on the skype icon, i run skype. Is it the normal way you guys run skype? Or how do you install it correctly so that i show up in launch pad or on the dock??? , forgive my ignorance. Just bought a mac this morning.