The key combination "Command + Shift + \" can't be used because it's already used

I ran into the same issue as well today. I had removed the ⌘\ shortcut to try something out and then wanted to re-assign it, but no luck. This is on an M2 MacBook Air. 1Password complains that the shortcut is already assigned, but that's not the case, as I can assign it within another app, and it's not showing up inside System Preferences. I'd appreciate if there was an actual solution to this problem.

I experienced the same issue when trying to set ⇧⌘\ and ⌘\ as shortcuts on my work machine (this doesn't occur on my personal).
My work around was to copy the preferences from my personal machine and paste them into my work machine.
Jack_P_1P 1P_Ben given this method worked, couldn't the 1password devs offer a bypass to the user that when agreed to, would force writing the keyboard shortcut to the preferences file?

Having a similar issues. Got a new laptop and trying to make my password fill shortcut cmd + shift + \ just as I had it on my old laptop.
* went through the deleting preferences steps that you outlined above Jack
* re-assigned show/hide tab overview in Safari to cmd + \ (to free up cmd + shift + \ in case that was the issue)
* went through all the steps https://support.1password.com/uninstall-1password/ to even try to uninstall 1pw completely + reinstall!

Still, nothing's working and still getting the error that cmd + shift + \ is used by a system-wide shortcut.

Any guidance on what to do?

FYI on 1Password 7 running on MacOS 12.6

Thank you Jack_P_1P for the advice. I tried completely quitting all other apps (even went into the activity monitor app to quit all suspicious processes), but no luck.

Hi @hnbc1:

Thanks for asking. As Ben mentioned, we're relatively limited on the actual APIs available to us when it comes to setting shortcuts, and if macOS tells us there's a conflict, we're unable to see what, if any, app is using those shortcut keys. If you quit all other apps and login items on your Mac, and try to set ⌘+\ as a shortcut in 1Password for Mac, are you able to then?

Jack

I had the same issue for a while now: not able to set 'Fill Login or Show 1Password' to ⇧⌘\ or ⌘\. Following Jack_P_1P's steps to reset preferences did not help.

macOS Monterey 12.4
1Password 7 for Mac
Version 7.9.5 (70905003)

Hey @thebigdreamer:

Thanks for following up, and be sure to let us know if you are able to find anything!

Jack

Thank you very much for the insight!

So I suppose there is an issue either in the latest version of macOS or a new shortcut (which actually does nothing…) specifically on new MacBook Pros.

I'll dig into this and let you know if I find anything.

I see where the thought comes from, but I confirmed with development that the check is not specific to US (or any other) keyboard layout. I wish I had a reliable way to be able to tell you what function / application is claiming the shortcut, but a good portion of this is a black box. The APIs available to us provide us with three bits of information:

• The key code
• The modifiers
• If the shortcut is enabled

even though the shortcut I want to use is not in conflict on my local Swiss keyboard

I'm afraid the APIs we have available to query to ask about this sort of thing are telling us that there is some sort of conflict, even if my initial assumption about which conflict it would be were inaccurate for your situation.

Ben

Yes, this makes me think that 1P is checking shortcut conflicts based on the US keyboard only, which would be why I’m getting a warning even though the shortcut I want to use is not in conflict on my local Swiss keyboard.