Oh, what a relief!!!! Yeah to it only being a faulty cable.
I am running Photoshop CS6.5 on my mac laptop using OS El Capitan 10.11.6 from all my research and an actual experiment going one OS higher to test, (which didn't work at all). This was the last OS I could get Photoshop/Indesign etc to work reasonably on, on my laptop but it all depends on the vintage of your machine. I wish you luck if you do try and would be interested in the results.
no subject
I am running Photoshop CS6.5 on my mac laptop using OS El Capitan 10.11.6 from all my research and an actual experiment going one OS higher to test, (which didn't work at all). This was the last OS I could get Photoshop/Indesign etc to work reasonably on, on my laptop but it all depends on the vintage of your machine. I wish you luck if you do try and would be interested in the results.