I finally got the GMYLE card (BC628) to work with 10.8.3!! I can only recommend this 10$ card if you're ready for some hackingHere's what I did (This will probably not work with every GMYLE card as the chipset may vary):
1. Remove the card from the slot
2. Download a patched PXHCD.kext (Link for the one which worked for me, else see below)
3. copy the downloaded kext to /System/Library/Extensions/
4. Open Terminal and type the following commands:
a) sudo chmod -R 755 /System/Library/Extensions/PXHCD.kext
b) sudo chown -R root:wheel /System/Library/Extensions/PXHCD.kext
c) sudo rm -R /System/Library/Extensions.kextcache
d) sudo rm -R /System/Library/Extensions.mkext
NOTE: if step c) or d) returns any error don't worry just proceed
e) sudo reboot
5. After reboot open diskutilty and repair permissions
6. Now shutdown your computer
7. Connect your USB 3.0 card
8. Turn on your computer
9. You're already done if it works, else proceed to 10.
10. Open System Profiler and check Extensions (whether the PXHCD.kext is loaded successfully or not..)
11. If it is not listed open terminal and type:
sudo kextload -v /System/Library/Extensions/PXHCD.kext
12. Now check your System Profiler whether the USB Super-Speed Bus is present or not.
13. If the kext did not load automatically but did after 11. you would have to do this after every reboot.
The best workaround I could imagine is:
14. download this shell file: Link
15. Put the load_kext.sh into /Users/Shared
16. Tell OS X to load this on every boot by running:
sudo defaults write com.apple.loginwindow LoginHook /Users/Shared/load_kext.sh
And accepting with your password. The card should work now after the next reboot; it's also hot-pluggable.
I downloaded the kext from this forum: Link and re-uploaded the 1.0.10 so that you won't have to register for InsanelyMac...
The instructions are partly copied from here: Link
And last but not least Thanks to Apple for explaining Login hooks here: Link
Hope this helps,
Luk
You, sir, just made my day and my '11 MBP now has 2 USB 3.0 ports. Worked just fine after step 9.
Thank you!