MBP 5.5 can't see my new Hard drive

MBP 5.5 can't see my new Hard drive even though its running Mavericks off the new Hard Drive through a usb cradle

I've seen suffienct posts on this site to not argue about the problems with SATA cables, however it sounds like what you're saying is that the SATA cable is bandwidth limited. The types of things I remember reading about are actual breaks in the cable, rendering it useless for all drives, or the insulation wearing off. In the latter, it's on units where the cable crosses over an optical drive and starts intermittently shorting out on the case. If this happens the user typically gets data corruption, but the drive is usually seen and visible.
On the other hand, I do software development and we have to be able to boot numerous versions of MacOS. For reasons known only to God (and Apple, I hope) once in a while the NVRAM seems to get mixed up and ends up being unable to see the boot drive. Doing the resets always corrects the problem.
I wouldn't dismiss your recommendation of replacing the cable, but the resets are free and easily done.
Another freebee to try would be to hold down the "alt' key before powering on the unit, turn on the power, and then, while holding down the alt key, see if the drive shows up as a bootable drive. This will only work if there's an OS installed on the drive.
In my opinion, it's always best to try the free things before going out and buying anything.

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