I have an old Macbook Pro for which I bought a new SSD and replaced the HDD with the SSD. Can't go further, see below.
I really don't know what to do. I could
- return the SSD which, finally, might be broken
- use a Linux distrib and gparted or fdisk, but the partition table they generate are not OS X compatible, I heard... Tell me which distrib I should put on my USB stick (GRML, Ubuntu,...)
Booted to both Recovery and El Capitan off a USB 64Gb Stick. The computer sees the SSD: Disk Utility shows "Samsung SSD 850 EVO 500GB Media"
Only accessible button "Erase" (no Partition) to:
OS X Extended (journaled), GUID Partition Map
Erase process failed
Unmounting Disk Wiping volume data to prevent future accidental probing failed. Operation failed....
retrying it doesn't work again: the mbp pauses for 30" at 'Unmounting Disk' and then:
Unable to write to the last block of the device. Operation failed...
- MacBook Pro9,2 (13” Mid 2012) original Snow Leopard
- 2.9 GHz Intel Core i7
- 8GB 1600 MHz DDR 3
- 13,3 inch 1280x800.
Also initialized the NVRam (ex PRAM).