I have read about every post about people having issues with their Arduinos on Macs. I have a 100% authentic Arduino UNO, that I cannot by any circumstance manage to connect to my late 2009 iMac with macOS Sierra 10.12.2.

I tried just about anything from disabling Apple FTDI drivers, installing FTDIUSBSerialDriver, D2XX drivers and even the CH34X drivers (for knockoffs). NOTHING works.

Not even setting boot arguments, not disabling default extensions/drivers, not removing extensions/drivers.

I am completely stuck, and no guide has ever worked. I've tried rebooting numerous times, but still no luck. The only port available in the Port menu is the Bluetooth Incoming port.

Does anyone have any tips or hints? I am on the verge of doing a complete reinstallation of my computer just to have all drivers back to default.

  • What does dmesg tell you while you plug it in? – Majenko Jan 11 '17 at 19:56
  • Alot of "AMFI: allowing exception handler for 'polard' (3658) because the process is unsigned." (I guess polard is my Polar heart rate monitor). Other messages: IO80211Interface::updateReport _peerManager is missing. That is basically it. – rebellion Jan 11 '17 at 20:15
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    Does the same USB port work for other USB devices? Try another port? Can you test whether another computer sees your Arduino? Substitute a different USB cable? – JRobert Jan 11 '17 at 23:37
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    It sounds a lot like the Arduino or the cable, just by the fact that it fails on at least two machine. I'm surprised, though, that you needed install any drivers. Macs have understodd FTDI out of the box since at least OS 10.6.8; It's just the alternative USB <-> serial chips that have needed any additional drivers. – JRobert Jan 12 '17 at 20:47
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    Just by powering it off. There aren't any arduino settings relevant to how it appears to a computer. That's built in to the auxilliary 8u2 or 16u2 processors' firmware and not configurable any way that I've ever heard of. – JRobert Jan 14 '17 at 0:35

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