Just wanted to let people know about issue I was having and found this device to be the culprit.
I needed front USB 3.0 ports on hackintosh build for convenience. Found this on Amazon and as a bonus it had a memory card reader. Works perfect with good reads however after several months of troubleshooting, I finally realized this device will prevent sleep in OSX. Decided to get external USB 3.0 port to correct the issue.
