I can't get a proper connection to my Epson R1800 printer. I need to be able to choose Paper type and size. It keeps saying that the downloads are fine, but the System Library Extensions SMC1255TX.kext aren't working?

Dear sweet Apples, that know all the answers...
I can't get a proper connection to my Epson R1800 printer. I get the basics , but I need to be able to choose paper sizes and paper Types.
It keeps saying that the downloads went fine, but then it says that the System/Library/Extensions cannot be used because SMC1255TX.kext
isn't working. My downloads are useless as a result

Did you restart the printer?

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I submitted the above question, later finding that it has been answered by Buller already. No one need reply as Buller's answer seems to solve the problem for others, and I'll try that.
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What does this mean? What should I do? The system extension "//System/Library/Extensions/AppleUSBEthernetHost.kext" was installed improperly and cannot be used. Please try reinstalling it, or contact the product's vendor for an update.

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You wrote that I should check out "Please see - AppleUSBEthernetHost.kext error on installing iTunes update" and I did so.
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I can't get a proper connection to my Epson R1800 printer. I need to be able to choose Paper type and size. It keeps saying that the downloads are fine, but the System Library Extensions SMC1255TX.kext aren't working?

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