I'm getting a second 3880 printer to print in color, which will be in my office where I also have a PC. I'll have it physically connected via the USB cable and try to run the Adjustment Program there to see what happens. Once I do that, by the end of the week, I'll have more insight before contacting 2manuals again. I'll keep you posted.
I also don't know if when trying to run the Adjustment Program from Parallels, it should recognize the Epson printer connected via USB, which in the Printer & Devices Control Panel in Parallels is identified as an HP Laser Printer, and not an Epson 3880 printer. I did try installing the Epson drivers on the PC (Windows in Parallels) but it doesn't seem to make a difference in the issue I'm getting.
As for the printer connected to my Mac, where I'm still unable to run the Adjustment Program in Parallels, your response provides a bit more insight, but still leaves a few questions lingering; let me describe and clarify:
1- I started with the printer filled with the OEM inks and printed on glossy paper using the PK OEM ink.
2- I removed the OEM ink set and installed all new 9 PiezoFlush carts. I was still on the active PK channel and did the instructed 2-3 Power Cleans which printed a clean PF nozzle check. Since I was going to print using the Selenium ink set on Matte paper, I switched from PK Black to MK Black and did another 2-3 Power Cleans until I got a clean PF nozzle check printout using the MK channel, which of course, wasted a lot of PF fluid from the 8 carts/lines that had already been completely flushed.
3- I removed all 9 PF carts and installed the new 9 Selenium + GO carts and with the MK channel still active, did the 2-3 Power Cleans and proceeded to print amazingly beautiful matte prints.
4- Here's where my current state of confusion begins:
4.1- In my mind, the PK line still has PiezoFlush fluid since it didn't get the Power Cleaning - is this correct?
4.2- When I do the black channel change in the printer, from MK to PK, the PK line and head which had PiezoFlush fluid gets flushed to ensure that PK channel nk is now being printed instead of MK channel ink - is this correct?
4.3- If so, why would I need to flush the PK line with the QTR-K flush printout?
4.3.1- Since those printouts came out totally black on glossy paper, is that the PK channel ink being used? There was no hint of pink PiezoFlush fluid printing at all.
Until I am able to figure out how to run the Adjustment Program, I need to know how to ensure the non-active black channel is completely flushed out of the previous ink and is either filled with PiezoFlush or with the Piezography ink. Can you please be very detailed in your response?
Thanks so much for all your help,