Hello, After I installed and rebooted, I get no entry sign with sensor sign: Specs: mid 2013 macbook pro OS: Yosemite Drive: Samsung 850 pro 265gb I've tried both El Capitan and Yosemite with this ssd and it's been acting weird, lots of PRAM and SMC boots, yosemite works better in the end. I downloaded chameleon and enabled TRIM since this SSD is third party, this seemed to fix things. I'm still able to hold the "option" key and repair my SSD drive, but that's about it. Do I have to install Yosemite from a flash drive again? Thanks!