Great news!
I was able to create a native Asana application for macOS. The link to the disk image holding the file is here: https://drive.google.com/file/d/1-8w76CoP4jAOWKJ6Quyiiw4gVHwhZ7WW/view?usp=sharing.
However, since I used the Fluid app creator for this, some features are still paid, such as entering fullscreen through the window controls or pinning to the menu bar. Asana has no affiliation with this SDK.
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