Spectacle is great but abandoned. It hasn't been updated in years. Bug reports and PRs are piling up.
It looks like someone else is currently working on a Swift rewrite. https://github.com/rxhanson/Rectangle
It looks like someone else is currently working on a Swift rewrite. https://github.com/rxhanson/Rectangle
> Spectacle used it's own keyboard shortcut recorder, while Rectangle uses MASShortcut [1], a well maintained open source library for shortcut recording in macOS apps. This cuts down dramatically on the number of bugs that were only in Spectacle because of the custom shortcut recorder.