What is this button?

I've highlighted it in red in the screenshot. It seems to show up almost all the time on my Mac, regardless of what applications I have open. Pressing it does nothing apparent. If I "Customize Control Strip..." in System Preferences, it disappears. It does not appear on Apple's list of touch bar icons.

I'm running macOS 10.12.6 on a 13" MBP.

  • It looks like something to do with the trackpad. Do you have any third-party trackpad software installed? – Mike Scott Oct 13 '17 at 4:36

That looks like it is from BetterTouchTool. You can configure it in the settings for BTT:


fifafu: You can disable it in the Touch Bar settings in BTT (go to the Touch Bar tab, then click the "General Touch Bar settings" button.
This may require a restart of BTT to become effective.

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