ERROR! cannot write in info.plist.

[Baylorc]

So I recently downloaded this game to my mac, and it has been working for 2 days. And for the past 2 days i did nothing to the files. Then one day, I tried to open it and it got the error message, "ERROR! Cannot write to Info.plist, this may be a permission problem, or it it is a read only file. [You must be logged in to view images. Log in or Register.] Somebody please help me.