Trying to give answers to questions I see coming up every now and again.

I'm stuck and can't progress the story

Have a look at this gameplay guide: 
https://docs.google.com/document/d/1RiddNpybmX089L_Ib_91Vdi4R8bLZWPqTnTvz3N5QnY/...

I'm stuck and can't progress Linda's story

The most common cause is Linda's outfit. She needs to be in her regular clothes (black & teal) for her story to progress. You might also want to take a look at this gameplay guide: 
https://docs.google.com/document/d/1RiddNpybmX089L_Ib_91Vdi4R8bLZWPqTnTvz3N5QnY/...

What's the solution to Emily's colour puzzle?

Have a look at this gameplay guide:
https://docs.google.com/document/d/1RiddNpybmX089L_Ib_91Vdi4R8bLZWPqTnTvz3N5QnY/...

Is there a Mac release and/or will there ever be?

I can't speak for the developer, but there is no Mac release for the game's current version and looking at other games made by this creator, I doubt there will be one. I suppose Mac users need to run this game inside an emulator.

How do I transfer saves to a new version?

I believe Siren describes it quite well in this community/forum post: 
https://itch.io/t/2332796/guide-transferring-save-files

I can't see my mouse cursor. What do I do?

You can restart the game by pressing F5. Do this until you can see your mouse cursor again.

Is there full screen mode?

You can press F4 to make the game fullscreen. Keep in mind that the artwork is in 720p and will be upscaled to your screen.

If there are any other questions that come up frequently, I'll add them here. You can also feel free to ask here.