I bought a Samsung SSD 850 EVO 250GB for my MacBook Pro 13'' Early 2011, but am unable to install OS X to it. (Yosemite 10.10.3)
When installing the SSD internally, OS X doesn't find the drive, and diskutil reports the following (tested with Internet Recovery, old install on external drive and own thumb drive installer):
/dev/disk0 #: TYPE NAME SIZE IDENTIFIER 0: FDisk_partition_scheme *250.1 GB disk0 1: 0xEE 250.1 GB disk0s1
However, when attaching the SSD via USB (externally) the following is reported by diskutil on the same machine:
/dev/disk0 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *250.1 GB disk0 1: EFI EFI 209.7 MB disk0s1 2: Apple_HFS SSD 249.7 GB disk0s2
Partitioning didn't work, hangs on "Waiting for volumes to reappear…". After installing OS X on the SSD while attached via USB and reinstalling internally, drive is not found again. Any ideas? SATA cable broken? Chipset broken?
Thank you for your help!
Addition: The old HDD works fine internally, but is very slow (constant beach balls, more that when used externally) and has a negotiated link speed of SATA 1.5 Gbps.