persistent wrong print orientation LR + Epson SC P6000

@sbar69 Consider this please, it’s a Mac thing I tripped over myself originally:

Epson / Mac: Add printer, AirPrint issue,

here are some notes about Apple’s built in Gimp Print / Gutenprint based printer driver.

Best avoided.  It can print quite differently from the manufacturer's own driver software. 

Does the print driver look different? some options have changed?

Are media names the same as previous drivers you've used, e.g.. is 'Premium Luster Photo Paper' mentioned or are the media types just simplified names like matte or gloss? 

You'll be aware, I'm sure, that the selected media name in the driver must match the selection made when printing ICC profiling patches, (so the ICC profile and media type selection are linked) . BUT is the media name selected previously actually there in the list?

IF the media names listed differ (and have been simplified) then you are perhaps inadvertently using Apple’s default Gimp/ Gutenprint driver rather than Epson’s own. It's not just a matter of installing Epson driver software, you have to select it too. I do know it's very important to use Epson's own driver software. I tripped over this myself on a client site, the driver looked different and I put it down to an OSX update imposed style - took a while to work that one out.

Here's an example of what I'd expect to see in an Epson driver for media name options:

Can you access print settings in an application other than Photoshop, try Preview?

If not, a thorough purge may be in order, perhaps install drivers (downloaded from Epson) again: 

1. Delete all instances of Epson printers from 

System Settings (or System Preferences depending on Mac OS version) / Printers & Scanners -or- System Preferences>Print & Fax, whichever you have.

2. Then go to /Library/Printers and trash the whole Epson folder.

3. Delete the Epson LFP Remote Panel (IF you are using that utility).

4. Then go to Epson online and download the printer drivers yourself.

Do not let the Mac install the printer driver for you.

There’s one more tripwire - in System Settings (or System Preferences depending on Mac OS version) / Printers  - - - , when adding the connected printer

[i.e. click the padlock, enter your password and click the “+” button]

watch out for the “Use" selection - I recommend you do not select "Airprint" there under "use", but, rather, manually set "use” to the printer name, which will then call on the manufacturer’s own software rather than the default Apple driver (that’s based on Gimp Print / Gutenprint, which misses out some printing options such as specific manufacturers media names). 

I hope this helps

neil barstow, colourmanagement net  - adobe forum volunteer - co-author: 'getting colour right'

google me "neil barstow colourmanagement" for lots of free articles on colour management

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@sbar69 when was the last time the printer driver or firmware was updated for the Epson SC P6000? Sometimes an outdated driver or firmware may be the reasons why you are experiencing this weird printer issue. It does say your printer can print up to 24", I am wondering if the document set up is more than 24.01+" and it will automatically adjust to conform to the print setttings. 

Did you do a small test print from LR? Don't use the presets, create your print settings manually. Do one at 23" Maybe one inch by 23"...and see if that works, and then another one at 23.5" and one at 24" — We used to manually set our large format printers as well. And sometime we want to optimized as many prints as possible on the printers, so, I totally get the frustration!