On a brand new M4 Mini working Sequoia 15.2 (24C101), I am making an attempt to share a USB printer. However except the pc has a consumer account with a username that matches the username of the incoming request, CUPS rejects the job.
Print sharing is enabled in Settings > Basic > Sharing > Printer sharing, the printer is marked for sharing and the permissions are “Everybody” “Can print”.
I enabled debug logging with cupsctl and right here is the related a part of the log:
D (07/Jan/2025:21:45:28 -0500) (Shopper 13) 2.0 Create-Job 3
D (07/Jan/2025:21:45:28 -0500) Create-Job ipps://Margarets-Mac-mini.native.:631/printers/EPSON_Stylus_Photo_R2880
D (07/Jan/2025:21:45:28 -0500) check_quotas: UUID lookup failed for consumer "socantre"
I (07/Jan/2025:21:45:28 -0500) Denying consumer "socantre" entry to printer "EPSON_Stylus_Photo_R2880" (unknown consumer)...
D (07/Jan/2025:21:45:28 -0500) Create-Job client-error-not-authorized: Not allowed to print.
E (07/Jan/2025:21:45:28 -0500) (Shopper 13) Returning IPP client-error-not-authorized for Create-Job (ipps://Margarets-Mac-mini.native.:631/printers/EPSON_Stylus_Photo_R2880) from (v1.fe80::10:b08d:dd81:36e9+en0).
The pc sharing the printer can print effective. So the printer works, the USB connection works. Drivers are updated.
If I create, on the pc sharing the printer, a consumer with a username that matches the distant consumer making an attempt to print, even when the passwords do not match, then there isn’t any error and the print sharing works effective. So I feel this guidelines out any points with the community, firewalls, and so forth.
Additionally putting in a Print-to-PDF printer from the app retailer and sharing it reveals precisely the identical habits and error, so the actual printer is just not the issue. Moreover, the habits is identical no matter which consumer laptop is making an attempt to print, each Mac and Home windows purchasers.
Trying on the cups configuration information, quotas look like disabled in /and so forth/cups/printers.conf:
QuotaPeriod 0
PageLimit 0
KLimit 0
AI additionally prompt including a Permit @LOCAL and Permit all to the assorted
Apple assist prompt including Sandboxing Relaxed to cups-files.conf, additionally unchanged.
I see another person had the identical downside in 2010 on the Apple assist boards, with no answer: https://discussions.apple.com/thread/2426299?login=true&sortBy=rank
Related setup on different Macs with printer sharing doesn’t current the identical error.
The workaround of making a dummy account with an identical title is perhaps virtually acceptable at this level, but it surely would not work for permitting Home windows computer systems to print, as a result of the username they submit comprises a backslash (domainusername) .
Here’s a screenshot of the printer sharing panel with the consumer record:
