Using PowerShell to zip or unzip ... individual files. PowerShell takes everything inside of the root directory and compresses it, subfolders, and all. Read: How to open .TAR.GZ, .TGZ or .GZ.
If not, right-click and select Open with then Archive Utility. How to unzip RAR files on a Mac Comparable to ZIP files, Roshal Archive (RAR) is another file format where you're able to hold large ...