SSD boots over USB, doesn't boot connected internally.
I tried replacing my internal HDD by an SSD (crucial m550 - 256Gb) on my Mac with the latest OS running.
I made a clone with carbon copy cloner from the original HDD to the new SSD (ca. 130Gb).
The SSD boots perfectly when connected over USB, but is not found when connected internally.
However, when I updated de SSD's firmware, I booted from a CD with the SSD connected internally and it was found without a problem.
When I boot with the SSD internally connected I just end up with a grey screen and a fold+questionmark icon.
- i updated firmware on ssd
- i checked if firmware on mac was latest version
- I cloned the disk again and checked there was a safety partition created
- a clean install from scratch is not an option: i've got software from my work that I can't get a new regkey for.
…I really have no clue what to do, but I can't get my SSD working. Any ideas? Thank in advance!