Bummer! Not sure what next step to take, but I’m sure someone will chime in with an idea. Maybe some of those terminal commands that tehn shared in the High Sierra thread you linked to could be helpful/revealing?
Yeah! I hope so. I’ll be honest, I’ve tried everything in that thread that @tehn suggested to the user I linked and they were getting the same results as myself and it seems as if it randomly started working eventually? This is quite strange. I appreciate you and @alanza 's assistance so far. I’m at a bit confused on what to try next. Cheers!
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I had a similar problem when I first tried using my grid. I had missed one step in the install. I think it was the FTDI VCP driver. Also make sure the serialosc service is running, I think it might not have started automatically for me. Looks like you already checked this.
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Is this the driver you’re talking about? Or is there something else I need to download?
I use Windows so I don’t know how it shows up on Mac, but searching other threads this looks like it may be correct.
Interestingly, the setup instructions at https://monome.org/docs/setup/ no longer mentions installing the FTDI driver. It might be pre-installed by latest Mac OS but definitely not for Windows. Wonder if that’s intentional?
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alanza
47
I think that on Mac, the current wisdom is that installing an FTDI driver is not recommended, and that if you install one, you should remove it; the system one suffices.
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Interesting because it was not being recognized either way though. Initially I did not do anything but install SerialOsc, which didn’t work.
So I know this is silly but do you think I should buy/find a different mini USB cable to try? My assumption is that the one i’m using is fine. When I plug the Grid in, it does light up in the corner.
alanza
49
if the grid lights up in the corner, it seems like the cable is probably fine? trying another one wouldn’t hurt, of course.
I’ll see if I can track one down, but yeah I’m pretty stumped over here 
tehn
51
i’d suggest deleting FTDIUSBSerialDriver.kext and rebooting.
once you’ve done that, open a terminal and type
ls -lrt /dev/tty.usb*
and post the results here.
i’m sorry to say that MacOS is a total pain. they’ve been messing around with these drivers and changing things for years now.
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Sorry to tag you, just seemed like we needed your help 
This is what I got so far.
Yeah from what I’ve been reading in my research the past 24 hours, looks like a lot of people have been having similar issues. I guess norns is looking like it may be a part of my future soon…
alanza
53
(this is while the grid is plugged in, yeah?)
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with or without the grid being plugged in!
tehn
55
with the grid plugged in you should see something like
/dev/tty.usbserial-m1000464
which means your FTDI driver is broken.
mojave has an Apple version by default, which works. perhaps it’s disabled?
try this:
sudo kextload -bundle-id com.apple.driver.AppleUSBFTDI
did you delete the old FTDI driver i suggested?
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uninstalled FTDI
Here’s what happened for my next step. It asked for a PW, (which I’m assuming is my admin password).
tehn
57
did you reboot after removing the FTDI?
seems like the AppleUSBFTDI is present if it didn’t throw an error. still nothing with ls -lrt /dev/tty.usb*?
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Yup, I’ve restarted a few times actually.
Getting the same issue with that command as well. Wild right?
tehn
59
well, that command should be blank if there are no results.
what does your screen in System Information look like?
here’s mine:
totally frustrating suggestion: do you have another computer you can test with, just to sanity-check?
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andrew
60
I wonder if this is the same issue @fourhexagons was having ? could be another source of input ?
personally been using an older grid with the latest macOS versions for like a year and a half now with no issues, which is why this is such a crazy & frustrating thing
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Nothing 
Do you think it potentially its the USB C hub i’m using? (i’ve had 0 issues with this in the past with any data transfer/midi usb devices)
For ultimate reference this is the machine I’m using:
