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Here is the solution for the error: "Encryption Credentials have expired" when attempting to print or scan from Mac OS or iOS devices: Click here to view the troubleshooting steps!
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Mine is a fairly old printer, but my iMac is only about 8 months old. I received a message that an upcoming update will not be compatible with this printer extension. So I went browsing to try to update it. I didn't find the word "extension" but I tried to download updated firmware and drivers. They did not download. So I didn't even try the only other option, which I think was a software update but was not sure from the title. I would obviously not want to lose the functionality of this printer, so I would be most appreciative if I could get some advice.

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