I’ve bought Your (new) SSD. I’ve got Macbook Pro mid-2012.
I’ve did ‘clean’ install Mac OSX Yosemite (latest system) - installed program Blackmagic Disk Speed test to check SSD speed - read is ok (about 500MB/s) but write speed is slow (about 150MB/s) which is far away from 500MB/s.
Thing is - I’ve installed Windows 8.1 on my Macbook - and everything is ok - got about 500MB/s read and write.
What is wrong with latest Mac OSX Yosemite? Especially even if I did “fresh” install system.