So, I'm running. 2015 Retina Macbook Pro 13' 16 GB 1867 MHz DDR3 2.7 GHz Intel Core i5 Yosemite 10.10.5 My problems so far are: I'd say at-least once a week my wifi just turns it self "off" and I cannot turn it back on by just hitting the button. The regular fix is a restart. Also, my ports sometimes don't immediately wake, or wake at all once coming out of sleep. Thanks in advance!