Install and connect

TakeOff needs macOS 26.5 or later and an App Store Connect API key with App Manager access. Setting up takes three screens: Welcome, your key, and the app to open.

Create a key

If you do not have a key yet, TakeOff walks you through it on the second screen, and the API key guide has the same steps. In short: in App Store Connect, open Users and Access › Integrations, generate a key with App Manager access, and download the .p8 file. Apple lets you download it only once.

Add the key

Drop the AuthKey_….p8 file on the window or choose it, then enter its Key ID and Issuer ID.

TakeOff checks the file on your Mac first: it must be a .p8 file, no larger than 16 KB, and contain a valid signing key. Only then does it ask Apple to verify the key. If something is wrong, the message says what happened, why, and what to do; while adding a key, Copy error detail puts the full text on the clipboard.

Choose an app

TakeOff lists the apps the key can see, with search and a platform filter. The app you open first becomes your Free app; see Plans and limits.