Okay, so i just bought a macbook pro and i want to install adobe flash player. I already download adobe flash player and it's my finder folder. I still need to install it and when I tried to install it, it says I need my username and password. I reckon it meant my apple id, i typed my username and password, but it says it's INCORRECT when I know it's definitely correct. I tried to go to the system preferences > users & groups > and tried to change my password. But when I typed my password it says IT'S INCORRECT! I've already changed my password twice in the apple id site, but it's still incorrect in my system preferences. I asked my sister who has a macbook pro and she said she didn't need to use any password or username. What should I do? Now I can't watch any vids or anything that contains flash..