Last week, I updated to 10.9.2 with the SSL update, and since I've had some major issues with my MBP. It's a 15", late 2013 model running the NVIDIA Geforce 750M. Anytime that the computer tries to switch to the Dynamic graphics card, as opposed to the integrated one, the program it's running freezes. Be it a web browser for video, Premiere for editing, or any other program; or if I try to manually switch to the Dynamic card. When I first got the MBP, I downloaded gfxCardStatus, and have used it since. The only way I've found to work around this issue is to force the computer to only use the Integrated Graphics card. Anyone have a workaround or a driver fix for this? I've tried downloading the WebDriver from NVIDIA, but it's compatible with my MBP. Thanks for the help!