well heres the story,

Im on OSX ok.  Now, i have a family pack so every has different logins, different accounts, etc.  My bro logged in as admin. he installed on HD so everyone can use it.  He tried to play, he can (as an admi.) when i try i cant because it says it cant write the file 'Backup.pln' file or w/e.  so inother words... i can't play.  Im thinkin it's because i dont have 'access privelages' to do so, so it doesnt allow me to.  Mb, mb not, how can i change that so i can or how can i jsut solve the problem.  My bro says the admin cant change the access privelages, though hes not 100% on that, hes full confident he gave all he could.  *sigh* as i say, if theres no way, OSX is gay.

you could also change the permissions of the entire Raven Shield folder, so that all files in there are Read & Write by all users. this prevents you from problems with other files that may have to be written by the game.

Elan