MacTracker gives the specs and history of every Mac ever made. I don't know why you're having trouble unzipping it. Perhaps someone else will be able to troubleshoot.

Jon

macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365