Install on macOS (Apple Silicon)
Fastest — one command, no warnings
Paste this into Terminal and press Return. It downloads TetherBay, moves it into Applications, clears the unsigned-beta flag, and opens it — so macOS never shows the “Apple could not verify” prompt at all.
curl -fsSL https://tetherbay.com/get.sh | sh
Prefer to click through it by hand instead? The manual steps below still work.
Or install by hand
TetherBay is in beta and not yet notarized by Apple, so macOS shows “Apple could not verify…” the first time you open it. If Finder still shows only a Done button, use the Terminal command below.
This is expected for the current unsigned beta. Before you install, you can check the file against the SHA-256 checksum published on the v0.2.650 release page.
Use Finder's Open command
Drag TetherBay into Applications, then in Finder hold Control, click TetherBay, choose Open, and confirm Open once.
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.
If macOS still refuses, run one Terminal command
Drag TetherBay into your Applications folder, then paste this into Terminal and press Return. After that, open TetherBay normally:
xattr -dr com.apple.quarantine /Applications/TetherBay.app
Get started in 3 steps
Install
No questions asked — run it and TetherBay starts immediately.
Open the app and enter your email
You get a 6-digit code. No password to create or remember.
Done — send your first file
Pick a folder to sync and your devices connect automatically.
No sign-up here — your email is entered inside the app on first launch.