: macOS will automatically use the Archive Utility to decompress 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 .
If you are trying to "prepare a piece" in the sense of a involving zippers (as suggested by some general search results), you would typically begin by printing and cutting your pattern pieces and marking your notches. Are you having trouble opening the file , or
The process on macOS is straightforward and usually doesn't require extra software: