Board Thread:Questions and Answers/@comment-28017790-20161217224545/@comment-28592066-20161217230547

Didn't know there's a mac version... if it's the same as the PC version then go to:

YandereSimulator_Data/StreamingAssets/JSON

You will find two files, Students.json and Topics.json, edit both. Look for a student with an ID number of 33. The name in Students.json will be "Reserved" and in Topics.json it will be "Unknown". Change both to "Osana Najimi" (note: you need to exit the game before you do this).

Save the file, start the game and Osana will be there. Note that she currently has only a partial routine (morning only). In the morning it will be difficult to get her because she stays close to Senpai, though she does leave him to take her phone call, at which point she is vulnerable. Her routine ends completely after class starts. She just stays in class until the end of the day so it's very easy to get her then, but obiously this will not be the case once she's officially added.