Right click the Wineskin wrapper (.app) you created and press 'Show Package Contents', then go to Contents/Resources/drive_c/Program Files/Steam/steamapps. Right click the WineBottler bottle (.app) you have and press 'Show Package Contents', then go to Contents/Resources/wineprefix/drive_c/Program Files/Steam/steamapps. Run the Wineskin wrapper (double-click or highlight and press Cmd + O, or etc) and get logged in to Steam, then Quit again. There’s a small list of known issues using Steam through Wine below and workarounds for them. Once the login screen comes up press Cmd + Option + Q, or right click the wrapper.app in the Dock and press Quit, or press Wine->Quit Wine on the menubar to close Steam and let Wineskin finish the installation so you can close it and finish the wrapper configuration as per the tutorial. Steam now (for me) auto-runs itself after installation, so if you get a checkbox that says 'Run Steam' at the end of installation uncheck it before clicking Finish, but if not then Steam will run and will update itself and you’ll see the usual login screen. Currently you will need to use Wine engine v2.12-staging or higher (including v2.12) to get Steam to install at least initially you should be able to switch to a lower engine version after installing Steam if you wish to do so (I’m 99% sure I tried and it worked will try again ASAP and edit in an update). Create a Wineskin wrapper which will replace the WineBottler bottle you already have setup.

Wineskin wrapper spyparty