Samsung 850 Evo SSD and iMac 21" mid 2010

[maximedev]

Hello,

I have bought a Samsung 850 512GB SSD for my mother's mid 2010 iMac.
I was able to swap the original hard drive with the SSD and install Yosemite on it.

It went great, but after a day, the screen went black and I don't hear the welcome music when I power it on.

I was wondering what it could be since nothing has changed. I haven't moved it or whatsoever.

Swapping back to the original hard drive make the iMac work.

Any idea what is going on ?

 

[techedude]

You need to run a program called Trim Enabler. 3rd party SSD's are not allowed as per Apple. Trim Enabler will disable kext signing and will run smoothly. EL Capitan allows 3rd party SSD's to be used without using that program. My advice is to plug in external and Download EL Capitan and update to the most current version. Then go ahead and reinstall the SSD into the iMac. If you stay on Yosemite than you will get kernel panics and your desktop will not boot if you update or do a PRAM reset.