Sometimes it worked.
I’m running a MacBook Pro (13-Inch, early 2011) with 2.Ghz Intel processor, an Intel HD 3000 512 MB graphics card and *16 GB* (that part is not stock), 1333MHz DDR3 RAM. OS X is currently el Capitan 10.11.6.
Even with Yosemite, this app never worked consistently. When it did work, I liked it, but I found myself having to log out of Netflix, reboot, start Go for Netflix again, and log back in to Netflix in order for this app to work, because it would freeze up while playing any video, ususally after approximately 20 minutes. After this started happening, I made sure to close other applications when I used Go for Netflix, but this did not resolve the issue.
I liked the idea of a standalone player for Netflix, so, 2 stars, but—lesson learned. I’ll not spend money on an app that lacks many good reviews.
KMVBH about Go for Netflix - Watch Videos & Movies, v1.5