Atmosphere and Fusee Not Working? Don’t Panic, Let’s Fix It!

While there is no official "McQuay Duct Sizer for Mac" application released by McQuay (now Daikin Applied), macOS users can run this classic HVAC tool by using the HVAC Duct Sizer app from Carmel Software Corporation available on the Mac App Store. Running McQuay-Style Sizing on a Mac

Are you using an Intel-based Mac or an Apple Silicon (M1/M2/M3) Mac?

He missed the "Equal Friction" and "Equal Velocity" methods that lived in the McQuay menus.

Once you've installed McQuay Duct Sizer using Wine, you can launch the software and start using it. Here are some general steps to get you started: