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About ofawx

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  1. Most likely, the USB controller chip on that card is not supported by macOS. The eBay listing doesn't specify which it uses; are you able to read the printing on the chip? There is a long post in the MacRumors > Mac Pro forum about supported USB3 cards; the current recommendation is those based on the ASM3142 chip. There are a few around on eBay/Aliexpress. I have one of these these in the mail, I can definitely advise when it arrives if it works correctly.
  2. I've got a simpler kernel patch that will remove the VMM flag without breaking sysctl, see here. It works well for me, please try it out.