Installed OS-X Sierra and now Photoshop 15.5.1 crashes when attempting to print. Print dialogue opens and settings can be modified, but when attempting to print PS crashes perhaps 9 out of 10 attempts. Most frustrating. I'm printing to an Epson 7890, but I have seen the same issue cited for Canon. Adobe support told me that Photoshop has not been tested on Sierra, but in reality Adobe has had Sierra for months and have even published known issues. I pay a ton of money for this thing to work and this nonsense from support is very annoying.