Nothing yearly for Steam, it's a one-off fee, I think about 100 USD these days (it changed over the years). For the macOS store it is a 100 USD a year or so, and of course they take their cut from your sales. I prefer Valve's way of doing business.
Oh, okay. You started talking about whether it’s worth releasing a Mac game on steam, and then brought up a yearly fee, so I was having trouble following where you transitioned.
