Crucial SSD 1Tb crashing in Macbook Pro

[MariaAugusta]

Hello, 
I bought a Crucial MX300 2.5-inch 1Tb SSD for my Macbook Pro Mid 2012 a couple of months ago. Since I have installed it, the computer does not boot properly. It takes too long to find the initializing disk (which in the case is the SSD) and it does not find all the times, so I have to be restarting the computer several times.  When I changed the SSD with my old HD, it worked fine. I have also tried to use my friend's SSD (which is from another brand) and it worked fine. My SSD is within the warranty time, so I really would like to solve this issue as soon as possible, because I work with my computer. 

[Crucial_YogiH · Accepted solution]

@MariaAugusta I am sorry for the issues that you have experienced with your SSD. It sounds like it may be a bad ribbon cable that connects from the logic board to the SSD. It's not unusual for issues with this cable with new SSDs, but that it still may work with another SSD or old HDD. This simplest and only real way to test if the cable is defective, would be by removing the SSD from the Macbook Pro, and testing it in a different environment. The easiest way to test externally is by connecting the SSD via some sort of external USB enclosure or cable. If you test it and the drive works fine in another environment it would point to the cable being the issue. We would advise replacing this cable and see if the issue resolves. You may find this cable at iFix or OWC. Please let us know if you have any other questions or concerns. 

[Ezeman]

I’m having the same problem with my late 2012 MacBook Pro with 1tb Crucial SSD. computer was working fine until I installed the SSD. Now after around 30minutes of listening to music ,or whatever it may be, the laptop gets really hit and freezes until I hold down power for 5 seconds. Help!

[HWTech]

Please provide the exact model of your MBPro.   You should be able to get this information by clicking on the Apple menu and selecting "About this Mac".   It should show up on the first screen.   If you are using an older OS, open the System Profiler (or System Information) and give me the device ID which should be something like MBP9,1.

What version of OS are you running and how did you setup your new SSD (fresh install, migration, clone)?

Also which model SSD do you have?

Is the fan on your laptop running fast when it gets hot?   Download and run Macs Fan Control and report the fan speed and the CPU & GPU temps (in C) when you believe it is running hot.   It will list several temps for the CPU and they should be fairly close, so just post the highest.    The app doesn't require any installation.