Am trying to install latest update on Mac (El Capitan 10.11-5) wit Google Chrome browser. Installer downloads but when I double click to do the installation a message comes up that asks for my user id and password. The user id dos is filled in already ( my actual name, not email address which is my adobe id) and if I put the just-changed password in it won't take it. No message appears to tell me what is wrong. The box just shimmies. Can you tell me what I am doing wrong/should do differently?