For HVAC engineers and designers, the (often remembered under the legacy McQuay brand, now part of Daikin Applied) has long been a staple freeware tool. Its primary function is simple but critical: to size ductwork based on friction loss or velocity, and to perform static pressure calculations. However, for professionals who rely on Apple’s macOS, accessing this tool presents a unique set of challenges.
Several highly-rated apps available on the Mac App Store replicate the McQuay experience: HVAC Duct Sizer: mcquay duct sizer for mac