A native macOS menu bar app for TOTP two-factor authentication. Import your accounts from Google Authenticator, 1Password, or paste otpauth:// URIs directly.

Download the latest .zip from Releases, unzip, and move OpenAuthenticator.app to /Applications.

Since this is signed with a development certificate (not notarized), you may need to right-click → Open on first launch, or allow it in System Settings → Privacy & Security.

Requires Xcode 15+ and XcodeGen.

brew install xcodegen
git clone https://github.com/xatuke/openauthenticator.git
cd openauthenticator
xcodegen generate

Build and sign (requires an Apple Development certificate — a free Apple ID works):

xcodebuild -project OpenAuthenticator.xcodeproj \
  -scheme OpenAuthenticator \
  -configuration Release \
  -destination 'platform=macOS' \
  -allowProvisioningUpdates \
  build

Or use the included script:

./build.sh        # Debug build
./build.sh Release  # Release build

The app bundle is output to Xcode's DerivedData. The build script prints the path.

A shield icon appears in your menu bar. Click it to authenticate and view your codes.

1. On your phone, open Google Authenticator → Transfer accounts → Export accounts
2. Screenshot all QR code pages
3. Transfer the screenshots to your Mac
4. In OpenAuthenticator, click the import button or drag & drop the images

1. Export from 1Password as CSV or .1pux
2. Click the import button and select the file

Click the link icon in the header and paste an otpauth://totp/... URI directly.

• Secrets are stored in the macOS Keychain with kSecAttrAccessibleWhenUnlockedThisDeviceOnly and .userPresence access control (requires biometric or passcode for every access)
• The app locks automatically after 60 seconds of inactivity
• Copied codes are auto-cleared from the clipboard after 10 seconds
• Clipboard entries are marked as concealed to prevent clipboard managers from recording them
• Secrets are zeroed in memory when the app locks

MIT