# Key to switch to specific Mac app

**URL:** <https://community.keyboard.io/t/key-to-switch-to-specific-mac-app/440>\
**Category:** Help and Getting Started\
**Created:** [October 18, 2017, 6:43am UTC](https://community.keyboard.io/t/key-to-switch-to-specific-mac-app/440 "2017-10-18T06:43:53Z")\
**Posts on this page:** 1\
**Showing post:** 11

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**Author:** ![mileskrains](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.keyboard.io/mileskrains/32/351_2.png) [@mileskrains](https://community.keyboard.io/u/mileskrains)\
**Post date:** [October 24, 2017, 5:22am UTC](https://community.keyboard.io/t/key-to-switch-to-specific-mac-app/440/11 "2017-10-24T05:22:25Z")

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Regarding setting up a Hyper key, also see [this comment](https://community.keyboard.io/t/mapping-a-single-keypress-to-a-chord/426/10) by Jesse. (This approach is also described by algernon [above](https://community.keyboard.io/t/key-to-switch-to-specific-mac-app/440/2), but I didn’t comprehend until reading jesse’s comment.

I was using Karabiner Elements as described above, but:

- doing it with LSHIFT(LALT(LCTRL(Key\_LeftGui))) directly in the key map is easier
- Karabiner Elements worked for this, but was logging lots of: “IOHIDDeviceOpen error: kIOReturnBadArgument (-536870206) Model 01…” and Karabiner Elements was using a bit more CPU with the Model 01 enabled than with any of my other external keyboards, possibly due to the error logging

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_[View the full topic](https://community.keyboard.io/t/key-to-switch-to-specific-mac-app/440)._