I can't print from CS5 using an imac with OS 10.9.3 this problem has only just happened after several weeks of printing perfectly. I reinstalled CS5 with no results.
I can print from other software on the imac with no problem. The printer is an Epson stylus R3000. I called Epson and they suggested its a PS problem. Already updated the print driver.
Any help appreciated.
According to your screen shot you don't have a file open in Photoshop.
A file needs to be open in PS before you can print it!