Hi guys, I've just installed a new kingston v300 120GB SSD on my MBP 2012. The Mac was insane slow already during the OS installation, I tried to install El Capitan, but it took too much time and it kept freezing at 80%. So I decided to install Maverick, and it went quite good despite the fact that it was still too much slow. I hoped it would have been better after the installation was complete, but instead now it's pretty unworkable. It took ages to do whatever action. I have a SATA 3 interface, and 4 GB RAM. Thanks!