Why is this needed?

On first launch, Hummingbird will ask you to grant “Accessibility Access” permissions. This is required so Hummingbird can move and resize windows of other apps. Without these permissions, Hummingbird does not work.

Recent macOS versions have added a security feature asking you as the user to allow this access. Please note that Hummingbird does not record or send any data. The sole purpose for this is to read the positions and sizes of windows and modify them according to your mouse or trackpad actions.

How do I grant permissions?

The dialog alerting you about “Accessibility Access” is shown on the left. You are probably here, because you clicked on the “Help” button in this alert dialog.

In order to proceed granting “Accessibility Access”, please click “Open System Preferences”. This will bring you to the “Security & Privacy” settings.

In “Security & Privacy” settings, please select the “Privacy” tab and authenticate by clicking the lock on the bottom left.

Finally, make sure the entry for “Hummingbird” under “Accessibility” is checked as shown in the screenshot.

And that's it - enjoy using Hummingbird!