Does anyone have experience with these drives. I'm finding very little online support for Mac specific troubleshooting and few reviews. I have installed the drive in the Macbook Pro, Partitioned and formatted as needed. The drive appears in disk utility sporadically and there is nothing I can find that tells me when it will or will not appear. But now I can't get it to mount at all or to appear. Other drives appear normally but not this one. Any thoughts or opinions on this drive.