Sounds to me like your curves and inks don't match for some reason.
If you can take the same printer and run from both new and old computer with
different results then that probably eliminates printer problems.
What inks and what curves are you using? Screen captures from each
setup may be useful.
Roy
On Sat, Aug 13, 2016 at 8:57 AM, parkersmithphoto@... [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com> wrote:
I recently bought a new Mac computer, switching from Yosemite to El Capitan. Now, when I am printing to my Quad4900, the prints are coming out posterized. Everything was working fine before, and still is, when I use the older computer.
Nozzle checks are perfect. The same problem is occurring with Lightroom and Print Tool, so it seems it must be a system level problem.
Any ideas?