: Find Futaken_v0.029R_Mac.zip in your Downloads folder or wherever you saved it.
If double-clicking doesn't work, you can use the for a manual extraction: Open Terminal (found in Applications > Utilities). Type unzip followed by a space. Drag and drop the .zip file into the Terminal window. Press Enter . Futaken_v0.029R_Mac.zip
The process on macOS is straightforward and usually doesn't require extra software: : Find Futaken_v0