I am hoping someone here is familiar with Mac OS from back in the day, specifically Mac OS 9. I picked up an old iMac G3 (in blue) this past weekend to play around with. More specifically, the Video Game History Foundation's Frank Cifaldi, aka TheRedEye on this site, put a zip file on Google Drive containing the QuarkXPress files and assets for a page of GamePro magazine that he got off the disks he grabbed from their office when they closed.
I could not open the files on legacy version of QuarkXPress for Windows and likewise I cannot get them open on the iMac either. They don't show up in the open dialog box in Quark 3.1, 4.1 or 5. No extension, added extension, nothing works. Now, I am very unfamiliar with Mac OS and how it works, so I am hoping someone here knows something that can help.