SSD not beeing recognized
I have just installed a Samsung 850 EVO 250 GB ssd in my Mac Mini (late 2012).
I have created a boot disk on an external Toshiba USB HD.
When I boot the USB HD to install the newest OS Sierra, I cannot see my drive anywhere.
I have checked the cables 10 times and all is a fit. Any ideas?
Thank you for your reply.
I am replaceing the internal 5200 RPM HD with the SSD.
Once I put the original drive back in - everything works (it boots the drive).
The external HD with the install partion on it is - unfortunately - just an external HD with not possibility to swap the disks out.
Is there a way of testing if the SSD is faulty? Could it be an issue that I boot from an external HD rather than USB? Could it be that I need to update the firmware?
Is this a good question?