Lightroom Classic 15.5 – Epson SC-P900 uses the wrong paper source on macOS Tahoe 26.6.2

I have a reproducible printing problem with Lightroom Classic 15.5 and an Epson SureColor SC-P900 on macOS Tahoe 26.6.2.

System:

• Lightroom Classic 15.5 (build 202607291506-b8869fa7)
• macOS Tahoe 26.6.2
• MacBook Pro 14-inch, 2021
• Apple M1 Pro
• Epson SureColor SC-P900
• Epson printer driver 13.34
• Printer connected via IP
• Latest printer firmware

Problem:

I use a 16-inch roll of Epson Premium Semigloss paper and normally print 40 × 60 cm photographs from Lightroom Classic.

This workflow worked previously.

With the Epson SC-P900 driver selected in Lightroom Classic, when I open Page Setup / start a print, the printer feeds/ejects the roll and displays:

“Paper out in Rear Paper Feeder. Load paper and touch OK. User-Defined / Plain / Bright White.”

The printer is actually correctly loaded with roll paper.

The important point is that the same printer, same roll paper and same Mac work correctly when using AirPrint.

I also tested the Epson driver outside Lightroom using the macOS test page. The printer again tries to use the Rear Paper Feeder instead of the Roll Paper Unit.

However, Epson Print Layout works correctly with the same Epson driver, printer and roll paper. In Epson Print Layout I can explicitly select:

• Paper Size: 406.4 × 609.6 mm
• Paper Source: Roll Paper
• Media Type: Epson Premium Semigloss

and the printer correctly prints the 40 × 60 cm image.

This suggests that the printer, roll paper, firmware and Epson driver are functioning correctly, but that Lightroom/macOS is sending or retaining the wrong paper-source information when using the normal Lightroom Print module.

Expected behavior:

Lightroom should send the print job to the Epson SC-P900 using the selected Roll Paper source.

Actual behavior:

The printer receives a command for the Rear Paper Feeder, resulting in a paper-out error and the roll being ejected.

I have already removed and re-added the printer and reinstalled the Epson driver. The problem remains.

Workaround:

Epson Print Layout works correctly, so I can currently print through the Lightroom → Epson Print Layout workflow.

Could Adobe please investigate whether Lightroom Classic 15.5 / macOS Tahoe 26.6.x is incorrectly passing the paper-source setting to the Epson driver?

There is also another Adobe Community report from August 19, 2026 describing a very similar SC-P900/Tahoe problem:
“Lightroom classic & Epson P900 driver using Tahoe forces Roll Paper mode.”