He, Someone I know just got a macbook pro. But she wants her mail to be locked (so you can't just open it). Cause she just works on her macbook and after she's done she closes the lid/screen. So she doesn't log out. She doesn't care about wether someone is on her mac, but she doesn't want anyone looking through her mail. (her children) So I searched for locking programs, and it appears you can lock your program by clicking with your right mouse on a program, than "get info". But the "locked" option is greyed out, even when I unlock the lock in the lower right. I tried to do it with a picture, which now has a lock, but that's all, no password required to open it. So is there an option to lock your mail app, or the emails inside it?