I'm using 3 different macOS systems. Only 1 of these systems is able to recognize that my multifunction printer is also a scanner. The other 2 only recognize it as a printer.
The printer in question is a 'Samsung M267x 287x Series'. (Which is now part of HP btw)
I've tracked the problem down to how those 3 systems are seeing the printer on the local network. Only one of them sees the 'Bonjour Multifunction' broadcast. The other 2 only 'Bonjour'.
Now I'm afraid if I upgrade Catalina to something higher, I'll lose the ability to my scanner...
The 3 systems:
- macbook pro 2017, running MacOS Catalina (sees 'Bonjour Multifunction')
- macbook pro 2021 - intel based, running MacOS Mojave (sees 'Bonjour' only)
- imac 2021 - M1 based, running MacOS Mojave (sees 'Bonjour' only)
I'm unsure were the problem is actually based. Is this HP's fault? Or MacOS fault? Is there anything I can do? Haven't found printer drivers on the HP site.
Below are the screenshots from both macbooks
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
Solution
For future reference, here are the steps to solve this problem:
As mentioned in the solution, I forgot to install a separate section of the driver. In the screenshot, you see 3 folders that are part of the driver download package.
You'll need to install the .pkg file in BOTH the MAC_Printer
(printer only) folder and the MAC_ICDM
(for the scanner) folder.
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