I am using a Epson R3000 printer with Cone Inks and InkJetMall carts. I recently began having problems with carts not being recognized when I go to print. It always involved the PK cart and occasional the LC cart. I am instructed to open and close the ink compartment door and this normally fixed the problem for the current printing session. I have tried removing and replacing the affected carts but the problem always returns within a day or so. The carts are not empty, all are over 1/2-2/3 full.
Second issue: I am using a MAC and am still on OS-X 10.9.5 and am reluctant to upgrade to 10.10 (Yosemite) because of rumors of Epson forcing a firmware upgrade which precludes the use of any 3rd party cart. Do you have any information on this. Yosemite definitely requires a new Epson driver which is downloadable from Apple.