Printers missing after updating to Mojave

Question

Printers missing after updating to Mojave

Immediately after updating from High Sierra to Mojave, around the end of October 2018, everything seemed to be working normally until I tried to print. The print window of the app I was in would not load. I opened System Preferences and checked my installed Printers. After a long wait, the Printers preference window opened and all three of my installed printers were missing. Before getting into a panic, I did a "Restart..." of the computer, and then went right to Preferences >> Printers, same issue, no printers in the list.

I searched the online community for assistance, but finding none, I decided to try one more thing.

1. Select "Shut down..." from the Apple menu

2. Wait a minute and then turn the computer back on.

3. Log in.

4. Check System Preferences >> Printers, and voila! the previously installed printers have reappeared.

On an ongoing basis, (even today) if a "Restart..." is undertaken, the printers still go missing. However, after a "Shut down...", turning the computer back on and logging in the printers have reappeared.

iMac (Retina 4K, 21.5-inch, 2017), macOS Mojave (10.14.1)

Posted on Nov 29, 2018 12:01 PM

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Answer 1

Nov 29, 2018 12:06 PM in response to GospelofJohn14v6

I had the same issue with both Brother DCP-6690CW and Samsung C480FW. Ran a network configuration and noticed that since updating to Mojave (when the print problems began) that the IPv6 had been disabled. Go into your printer settings and enable IPv6, turn printer off and restart and all should be OK again.

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Answer 2

Nov 29, 2018 12:56 PM in response to bmwx5duncan

Thanks for the suggestion. Could you provide more detail about where I will find the "Enable IPv6" setting. I don't see anything obvious in "System Preferences >> Printers & Scanners". Or, is it in the LocalHost CUPS?

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Answer 3

Nov 29, 2018 1:34 PM in response to bmwx5duncan

I found the IPv6 setting on one printer which has a touch screen and changed it to ON, my other printer doesn't have a touch screen. I performed a "Restart..." on my iMac and all the printers were there this time.

I turned the IPv6 setting to "Off" again, turned the printer off and back on and then performed a "Restart..." on my iMac again and all the printers were still there.

I can't seem to replicated the issue at this time, so I'll consider it solved for now. Thanks for the tip.

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Answer 4

Nov 29, 2018 1:29 PM in response to GospelofJohn14v6

On both of my printers, the settings for the IPv6 were found on the touch screen of the printers, not through the PC

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Answer 5

Nov 29, 2018 1:38 PM in response to GospelofJohn14v6

Glad its worked for you mate, it's took me 2 weeks of pulling my hair out to find the problem so fingers crossed its a permanent fix and not temporary.

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Printers missing after updating to Mojave

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