MacOS – In macOS Mojave, is there a list of unused keyboard combinations for shortcuts

keyboardmacosshortcut

I am trying to define a new shortcut for "Select the previous input source", since the default shortcut (Control + Space) is conflicting with another app I need to use. Is there any table with a list of unused shortcuts in Mojave that could be good candidates for custom shortcuts? I am trying to find a balance between good usability (not having to stretch the hand in awkward positions to type the shortcut) and avoiding conflicts with already existing shortcuts.

Best Answer

Is there any table with a list of unused shortcuts in Mojave that could be good candidates for custom shortcuts?

There is not. There are a few utilities out there which will show you which key combinations are in use¹ but none (that I am aware of) show you available keyboard shortcuts.

¹ I believe KeyCue is the most well-known and best supported.

One common method among Mac power users is the use of a Hyper Key which is (generally speaking) where you remap holding down the Caps Lock key to equal holding down ⌘ ⇧ ⌥ ⌃ because few apps (and few macOS default shortcuts) use all 4 modifiers (mostly because it is awkward to try to press them all at once, which is why remapping the Caps Lock key is recommended).

Personally, I use a Hyper Key with Keyboard Maestro because, unlike shortcuts defined in System Preferences, Keyboard Maestro's shortcuts are easy to backup/restore, and easy to sync across multiple Macs.