When I press the left shift key a ± appears on the screen. It is a bit hit and miss, but for the most part it happens.

Googling I found this seems to be a common problem. The common recommendation is to reset the NVRAM and SRAM.

  • I did both of those things
  • It was recommended to try to reset the NVRAM several times so I did that
  • uninstalled my logic mouse driver (which uninstalled the related kernel extensions)

How can I get this fixed?

[EDIT] This is a 16" MBP. I am using a matias keyboard. It is a $100 keyboard from Fry's. Pretty high end; the action is really good.

[EDIT] I plugged in an old MS keybaord I had laying around. IT was working when I traded up to the new keyboard. IT throws garbage on the screen when I press the shift keys.

  • What kind of Mac are you running (and, if it is not a laptop, what kind of keyboard)? – nohillside Sep 10 at 19:32

I went and bought a new keyboard and it works fine.

I had my friend plugin my broken keyboards and they have similar behavior on his Windows 10 PC (garbage on the shift keys).

I consider this solved but I am stumped that I have two keyboards with similar failure.

I would delete this question but there are other people reporting the ± on the left shift key too so I am just going to leave this question undeleted.

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By default on macOS, typing ⌥ Option ⇧ Shift = (equal key not on an extended/numeric keyboard) results in the plus-minus sign (±). It seems likely that one of the keys being used as Option was stuck.

Since a second external keyboard also created unexpected results, it's possible that the stuck or malfunctioning Option key is on the laptop's internal keyboard.

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  • I like the way you think, but I tried the keyboards on my friends windows computer and they did not work there either. I am chalking it up to a really strange coincidence. – Be Kind To New Users Sep 12 at 15:52
  • Not just the option key has to be stuck, also the = key, which seems most. unlikely. – Tom Gewecke Sep 12 at 16:08

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