I have a 13" mid 2012 macbook pro. I just installed a Samsung 830 128gb SSD in the optical bay and used CCC to clone the OS drive over. Ran into a couple of issues, but finally got it working. Changed the boot disk to the SSD. Everything seems to be working fine, but boot up time didn't improve much over the HDD (from 53 secs down to 43 or so). Does that sound right? What should the boot time be? Programs do seem to launch faster though. The original HDD is still in there... could that be interfering with anything? I have a 1TB drive I'm going to replace it with once I make sure the SSD is ok. Is there anything else I need to do? I thought about updating the SSD firmware, but now I see that you can't update the Samsung drives on OSX. Thoughts? Thanks.