Yup nothing too crazy, this update was supposed to be out in april but due to the patreon problem, the render mistake, the side stories and the new writer it got held up so the content is not much really.
There isn't one, I made a Mac build page 46, you can play the PC version on Mac with the SDK or build one yourself from the PC version on Mac in a few seconds/minutes.
The script display what you read on the screen, you just open it and change the dialogue to what you want to say or not say for instance. .rpy files you can open with any text document reader, example, Notepad.