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According to the PyCharm Keymap for Mac, Control + Up Arrow and Control + Down Arrow are used to navigate between the previous and next methods. OSX of course uses these key combos for (Control + Arrow Keys) for navigating between applications.

Is there no solution beside remapping these keys in either OSX or in PyCharm?

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Yes!

  1. Open System Preferences
  2. Open "Mission control"
  3. Disable that hotkeys.
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In Mojave 10.14 to disable Ctrl-up arrow and Ctrl-down arrow, go to System Preferences -> Keyboard -> Shortcuts -> click on Mission Control in left panel. Disable shortcuts that correspond to Ctrl-up arrow and Ctrl-down arrow (Mission Control and Application Windows).

Control + Up Arrow and Control + Down Arrow should now work in PyCharm

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