Hi, I have an SSD as my boot drive (OCZ 240gb) and i have just received a Crucial M500 960gb. I want to use the M500 as a data drive in an optibay. I installed everything (hardware related), booted the mac back up expecting to see the drive on my desktop - nothing. I went to disk utility and was relieved to see the drive there, so went to format it - it wouldn't let me... I decided to remove the drive, connect via USB, format (worked) and then replace back into the mac. Well, now it's just weird. It sees it, but not right away. It shows up on my desktop maybe up to 5 minutes after booting. If i go into disk utility, every command i try just hangs and takes ages, and reformatting/erasing still does not work. I tried to copy data to the drive only to find that it is read only and cannot be changed... I then consulted the internet and found that this is a common problem with any optibay and Sata 3 ssd. Now, is there anything that i can do? Or do i just return it? I am still desperate for this to work so i can use it for my work. I use a lot of sound libraries for music composition and their fairly large file sizes need to be loaded fast for efficiency. My macbook is a 15" late 2011, and it has 6/6 speeds on the main bay and optical bay (unlike the earlier 6/3 models). I've looked into shielding, but this only seems to work in some cases, and i really don't want to risk short circuiting my macbook with foil because of an accidental bad job... Please, any help? Would it even be possible to force Sata 2 speeds?? Edit: Also, i have about 40 days to return the SSD. It was a lot of money so if it won't work in the way i want it to, i'll probably just return and refund it.