Quick google search came up with this. Hope this helps.
https://osxdaily.com/2013/02/13/open-zip-cpgz-file/ -p On 10/1/2025 10:21 AM, Rick Womer wrote:
A friend recently sent usI a set of photos in cpgz format, which I have never encountered before. I can’t figure out how to open the files. Any suggestions? -- %(real_name)s Pentax-Discuss Mail List To unsubscribe send an email [email protected] to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
-- If you are being chased by a pack of taxidermists, do not play dead. -- %(real_name)s Pentax-Discuss Mail List To unsubscribe send an email to [email protected] to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.

