Install with one command

Paste the command shown below into Terminal and press Return. It downloads TetherBay, installs it in /Applications if that folder is writable or in ~/Applications otherwise, removes the quarantine attribute from the downloaded app, and opens it.

For manual installation, follow the version-specific steps below.

Or install by hand

TetherBay is in beta and has not yet been notarized by Apple. macOS may warn that Apple could not verify the app. If you cannot open it through Finder, the Terminal command below provides another installation method.

This is expected for the current unsigned beta. Before you install, you can check the file against the SHA-256 checksum published on the v0.2.818 release page.

1. A

   On older macOS versions: use Finder's Open command

   On macOS versions before Sequoia 15, drag TetherBay into Applications, then in Finder hold Control, click TetherBay, choose Open, and confirm. On Sequoia 15 or later, use the System Settings steps below.

2. B

   Allow it in System Settings

   Try to open TetherBay once, then go to System Settings → Privacy & Security, scroll to the bottom and click Open Anyway. Open the app again and confirm.

3. C

   If macOS still refuses, run one Terminal command

   Place TetherBay in /Applications. The command below assumes the app is at /Applications/TetherBay.app; if you installed it elsewhere, replace that path in the command with the app’s actual path. Paste the command into Terminal and press Return, then try opening TetherBay again.

   xattr -dr com.apple.quarantine /Applications/TetherBay.app