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As a developer, the thing that excites me the most about the Touch Bar is the fact that there's a dedicated Xcode "pause" button on it when you're debugging an app in Xcode. If I were developing a macOS app that would finally be a great way of pausing in the middle of a mouse gesture or keyboard chord. But since I'm doing iOS development these days I don't actually end up using it, oh well.

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That pause button is usually a function key in other keyboards.

Having it be a physical key, no matter what, can screw with trying to debug key chords in an app.

And Xcode doesn't use a function key to pause, since that would also interfere with any apps that use function keys. The default keyboard shortcut for pausing in Xcode is ⌃⌘Y, and I think you have to bring Xcode to the foreground for that to work anyway.

There's nothing stopping you from just remapping a regular key. You don't need a Touch Bar to get a "pause" button for XCode.

See https://news.ycombinator.com/item?id=20395158

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